LAN83C185-JD [SMSC]
HIGH PERFORMANCE SINGLE CHIP LOW POWER 10/100 ETHERNET PHYSICAL LAYER TRANSCEIVER; 高性能单芯片低功耗10/100以太网物理层收发器型号: | LAN83C185-JD |
厂家: | SMSC CORPORATION |
描述: | HIGH PERFORMANCE SINGLE CHIP LOW POWER 10/100 ETHERNET PHYSICAL LAYER TRANSCEIVER |
文件: | 总61页 (文件大小:924K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LAN83C185
High Performance Single
Chip Low Power 10/100
Ethernet Physical Layer
Transceiver (PHY)
Datasheet
Product Features
■ Single Chip Ethernet Phy
■ Comprehensive power management features
■ General power-down mode
■ Energy Detect power-down mode
■ Fully compliant with IEEE 802.3/802.3u standards
■ 10BASE-T and 100BASE-TX support
■ Supports Auto-negotiation and Parallel Detection
■ Automatic Polarity Correction
■ Integrated DSP with Adaptive Equalizer
■ Baseline Wander (BLW) Correction
■ Media Independent Interface (MII)
■ 802.3u compliant register functions
■ Vendor Specific register functions
■ Low profile 64-pin TQFP package; green, lead-free
package also available
■ Single +3.3V supply with 5V tolerant I/O
■ 0.18 micron technology
■ Low power consumption
■ Operating Temperature 0° C to 70° C
■ Internal +1.8V Regulator
Applications
■
■
■
■
■
■
■
LAN on Motherboard
10/100 PCMCIA/CardBus Applications
Embedded Telecom Applications
Video Record/Playback Systems
Cable Modems And Set-Top Boxes
Digital Televisions
Wireless Access Points
ORDERING INFORMATION
Order Number(s):
LAN83C185-JD for 64 pin TQFP package
LAN83C185-JT for 64 pin TQFP package (green, lead-free)
SMSC LAN83C185
DATASHEET
Rev. 0.8 (11-16-04)
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
80 Arkay Drive
Hauppauge, NY 11788
(631) 435-6000
FAX (631) 273-3123
Copyright © SMSC 2004. All rights reserved.
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete
information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no
responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without
notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does
not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC
or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard
Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors
known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request.
SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause
or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further
testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale
Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered trademark of Standard Microsystems
Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND
ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE.
IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES;
OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON
CONTRACT; TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR
NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Rev. 0.8 (11-16-04)
2
SMSC LAN83C185
DATASHEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
0.1
LAN83C185 Datasheet Revision History
This section shows in the datasheet after initial release only and it is also shown in the specification
as it is referenced along with the ProgName PAS Revision History table.
Table 0.1 LAN83C185 Datasheet Revision History
REVISION
LEVEL AND
NAME
DATE
SECTION/FIGURE/ENTRY
CORRECTION
Added lead-free.
B. Zabor
Rev. 0.8
Ordering Information
(11-16-04)
D. Meyerhoff
P. Brant
Rev. 0.7
Table 3.7, “Analog References,”
on page 15
Updated description of pin 59.
Default value revised.
(06-15-04)
Rev. 0.7
05-25-04
Table 5.37, “Register 3 - PHY
Identifier 2,” on page 36
P. Brant
Rev. 0.7
05-25-04
Table 6.1, “Power Consumption
Device Only,” on page 55;
Table 6.2, “Power Consumption
Device and System
Most values updated, last 2 notes below
each table added.
Components,” on page 56
P. Brant
Rev. 0.7
05-25-04
Table 6.3, Table 6.4, Table 6.5,
Table 6.6, Table 6.7 and
Table 6.8.
Buffer Type column removed from
tables.
D. Meyerhoff
Rev. 0.6
12-12-03
Table 5.8, “Auto-Negotiation Link
Partner Next Page Transmit
Register: Register 7 (Extended),”
on page 29
Cross reference to note removed from
table title.
D. Meyerhoff
D. Meyerhoff
Rev. 0.6
12-12-03
Section 6.5.2.1, "Power
Consumption Device Only," on
page 55
Revised current measurements.
Revised current measurements.
Rev. 0.6
12-12-03
Section 6.5.2.2, "Power
Consumption Device and
System Components," on
page 56
D. Meyerhoff
Rev. 0.6
12-12-03
Table 6.2, “Power Consumption
Device and System
LED indicator values updated in note
following table.
Components,” on page 56
V. Kandalla
V. Kandalla
Rev. 0.6
12-09-03
Reference Schematic
Removed from document.
Removed from document.
Rev. 0.6
12-09-03
Bill of Materials
SMSC LAN83C185
3
Rev. 0.8 (11-16-04)
DATASHEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table of Contents
0.1
LAN83C185 Datasheet Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 1 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1
Architectural Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 2 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 3 Pin Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 4 Architecture Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1
4.2
Top Level Functional Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
100Base-TX Transmit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
100M Transmit Data across the MII. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4B/5B Encoding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Scrambling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
NRZI and MLT3 Encoding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
100M Transmit Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
100M Phase Lock Loop (PLL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3
100Base-TX Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.3.6
4.3.7
4.3.8
4.3.9
100M Receive Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Equalizer, Baseline Wander Correction and Clock and Data Recovery . . . . . . . . . . . . . 20
NRZI and MLT-3 Decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Descrambling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Alignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5B/4B Decoding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Receive Data Valid Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Receiver Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
100M Receive Data across the MII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.4
4.5
10Base-T Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.4.1
4.4.2
4.4.3
10M Transmit Data across the MII. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Manchester Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
10M Transmit Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
10Base-T Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.5.1
4.5.2
4.5.3
4.5.4
10M Receive Input and Squelch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Manchester Decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
10M Receive Data across the MII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Jabber detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.6
4.7
MAC Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.6.1 MII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Auto-negotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.7.1
4.7.2
4.7.3
4.7.4
Parallel Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Re-starting Auto-negotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Disabling Auto-negotiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Half vs. Full Duplex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.8
PHY Management Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.8.1 Serial Management Interface (SMI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Chapter 5 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.1
5.2
5.3
SMI Register Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
SMI Register Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Management Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Rev. 0.8 (11-16-04)
4
SMSC LAN83C185
DATASHEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
5.4
5.5
5.6
Miscellaneous Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.4.7
5.4.8
5.4.9
Carrier Sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Collision Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Isolate Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Link integrity Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Power-Down modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
LED Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Loopback Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Configuration Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Analog. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.5.6
5.5.7
5.5.8
5.5.9
ADC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
100M PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
MT_100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10M Squelch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10BT Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10M PLL - Data Recovery Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
PLL 10M - Transmit Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
XMT_10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Central Bias. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
DSP Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.6.1
5.6.2
General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
ADC Gray code converting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Chapter 6 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.1
6.2
Serial Management Interface (SMI) Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
100Base-TX Timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.2.1
6.2.2
100M MII Receive Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
100M MII Transmit Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.3
10Base-T Timings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.3.1
6.3.2
10M MII Receive Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10M MII Transmit Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.4
6.5
Reset Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.5.1
6.5.2
6.5.3
Operating Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
DC Characteristics - Input and Output Buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Chapter 7 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
SMSC LAN83C185
5
Rev. 0.8 (11-16-04)
DATASHEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
List of Figures
Figure 1.1 LAN83C185 Architectural Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 2.1 Package Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 4.1 100Base-TX Data Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 4.2 Receive Data Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 4.3 Relationship Between Received Data and Some MII Signals . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 4.4 MDIO Timing and Frame Structure - READ Cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 4.5 MDIO Timing and Frame Structure - WRITE Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 5.1 PHY Address Strapping on LEDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 7.1 64 Pin TQFP Package Outline, 10X10X1.4 Body, 2 MM Footprint . . . . . . . . . . . . . . . . . . . . 61
Rev. 0.8 (11-16-04)
6
SMSC LAN83C185
DATASHEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
List of Tables
Table 0.1 LAN83C185 Datasheet Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 2.1 LAN83C185 64-PIN TQFP Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 3.1 MII Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 3.2 LED Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 3.3 Management Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 3.4 Configuration Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 3.5 General Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 3.6 10/100 Line Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 3.7 Analog References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 3.8 Analog Test Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 3.9 Power Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 4.1 4B/5B Code Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 5.1 Control Register: Register 0 (Basic) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 5.2 Status Register: Register 1 (Basic) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 5.3 PHY ID 1 Register: Register 2 (Extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 5.4 PHY ID 2 Register: Register 3 (Extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 5.5 Auto-Negotiation Advertisement: Register 4 (Extended). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 5.6 Auto-Negotiation Link Partner Base Page Ability Register: Register 5 (Extended). . . . . . . . . 29
Table 5.7 Auto-Negotiation Expansion Register: Register 6 (Extended). . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 5.8 Auto-Negotiation Link Partner Next Page Transmit Register: Register 7 (Extended) . . . . . . . 29
Table 5.9 Register 8 (Extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 5.10 Register 9 (Extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 5.11 Register 10 (Extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 5.12 Register 11 (Extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 5.13 Register 12 (Extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 5.14 Register 13 (Extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 5.15 Register 14 (Extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 5.16 Register 15 (Extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 5.17 Silicon Revision Register 16: Vendor-Specific. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 5.18 Mode Control/ Status Register 17: Vendor-Specific . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 5.19 Special Modes Register 18: Vendor-Specific . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 5.20 Reserved Register 19: Vendor-Specific. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 5.21 TSTCNTL Register 20: Vendor-Specific . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 5.22 TSTREAD2 Register 21: Vendor-Specific . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 5.23 TSTREAD1 Register 22: Vendor-Specific . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 5.24 TSTWRITE Register 23: Vendor-Specific . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 5.25 Register 24: Vendor-Specific. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 5.26 Register 25: Vendor-Specific. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 5.27 Register 26: Vendor-Specific. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 5.28 Special Control/Status Indications Register 27: Vendor-Specific . . . . . . . . . . . . . . . . . . . . . . 33
Table 5.29 Special Internal Testability Control Register 28: Vendor-Specific . . . . . . . . . . . . . . . . . . . . . . 33
Table 5.30 Interrupt Source Flags Register 29: Vendor-Specific . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 5.31 Interrupt Mask Register 30: Vendor-Specific. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 5.32 PHY Special Control/Status Register 31: Vendor-Specific . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 5.33 SMI Register Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 5.34 Register 0 - Basic Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 5.35 Register 1 - Basic Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 5.36 Register 2 - PHY Identifier 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 5.37 Register 3 - PHY Identifier 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 5.38 Register 4 - Auto Negotiation Advertisement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 5.39 Register 5 - Auto Negotiation Link Partner Ability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 5.40 Register 6 - Auto Negotiation Expansion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 5.41 Register 16 - Silicon Revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SMSC LAN83C185
7
Rev. 0.8 (11-16-04)
DATASHEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.42 Register 17 - Mode Control/Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 5.43 Register 18 - Special Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 5.44 Register 20 - TSTCNTL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 5.45 Register 21 - TSTREAD1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 5.46 Register 22 - TSTREAD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 5.47 Register 23 - TSTWRITE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 5.48 Register 27 - Special Control/Status Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 5.49 Register 28 - Special Internal Testability Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 5.50 Register 29 - Interrupt Source Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 5.51 Register 30 - Interrupt Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 5.52 Register 31 - PHY Special Control/Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 5.53 MODE[2:0] Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 6.1 Power Consumption Device Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 6.2 Power Consumption Device and System Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 6.3 MII BUS INTERFACE SIGNALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 6.4 LAN Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 6.5 LED Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 6.6 Configuration Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 6.7 General Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 6.8 Analog References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 6.9 Internal Pull-Up / Pull-/Down Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 6.10 100Base-TX Transceiver Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 6.11 10BASE-T Transceiver Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 7.1 64 Pin TQFP Package Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Rev. 0.8 (11-16-04)
8
SMSC LAN83C185
DATASHEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Chapter 1 General Description
The SMSC LAN83C185 is a low-power, highly integrated analog interface IC for high-performance
embedded Ethernet applications. The LAN83C185 requires only a single +3.3V supply.
The LAN83C185 consists of an encoder/decoder, scrambler/descrambler, transmitter with wave-
shaping and output driver, twisted-pair receiver with on-chip adaptive equalizer and baseline wander
(BLW) correction, clock and data recovery, and Media Independent Interface (MII).
The LAN83C185 is fully compliant with IEEE 802.3/ 802.3u standards and supports both 802.3u-
compliant and vendor-specific register functions. It contains a full-duplex 10-BASET/100BASE-TX
transceiver and supports 10-Mbps (10BASE-T) operation on Category 3 and Category 5 unshielded
twisted-pair cable, and 100-Mbps (100BASE-TX) operation on Category 5 unshielded twisted-pair
cable.
1.1
Architectural Overview
Transmit Section
1.8V
Regulator
MODE0
10M Tx
10M
Auto-
Negotiation
MODE1
MODE2
MODE Control
Logic
Transmitter
TXP / TXN
Management
Control
SMI
100M Tx
Logic
100M
Transmitter
nRESET
Receive Section
XTAL1
XTAL2
TXD[0..3]
TX_EN
PLL
DSP System:
Clock
100M Rx
Analog-to-
Digital
TX_ER
Interrupt
Logic
Data Recovery
Equalizer
TX_CLK
nINT
Generator
RXP / RXN
RXD[0..3]
RX_DV
PHY
100M PLL
RX_ER
Address
Latches
PHYAD[0..4]
RX_CLK
SPEED100
LINKON
10M Rx
Logic
Squelch &
Filters
CRS
COL
LED Circuitry
GPO Circuitry
ACTIVITY
FDUPLEX
MDC
GPO0
GPO1
GPO2
10M PLL
MDIO
Central
Bias
Figure 1.1 LAN83C185 Architectural Overview
SMSC LAN83C185
9
Rev. 0.8 (11-16-04)
DATASHEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Chapter 2 Pin Configuration
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
1
2
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
CRS
GPO0/MII
GPO1/PHYAD4
GPO2
COL
3
nINT
4
MODE0
TXD3
TXD2
VDD3
TXD1
TXD0
VSS7
TX_EN
TX_CLK
5
MODE1
6
MODE2
7
VSS1
8
VDD1
LAN83C185
9
TEST0
10
11
12
13
14
15
16
TEST1
CLK_FREQ
REG_EN
VREG
TX_ER/TXD4
VSS6
VDD_CORE
VSS2
RX_ER/RXD4
RX_CLK
SPEED100/PHYAD0
RX_DV
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Figure 2.1 Package Pinout
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA1S0HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 2.1 LAN83C185 64-PIN TQFP Pinout
PIN NO.
PIN NAME
PIN NO.
PIN NAME
1
GPO0/MII
GPO1/PHYAD4
GPO2
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
RX_DV
RX_CLK
RX_ER/RXD4
VSS6
2
3
4
MODE0
5
MODE1
TX_ER/TXD4
TX_CLK
TX_EN
VSS7
6
MODE2
7
VSS1
8
VDD1
9
TEST0
TXD0
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
TEST1
TXD1
CLK_FREQ
REG_EN
VREG
VDD3
TXD2
TXD3
VDD_CORE
VSS2
nINT
COL
SPEED100/PHYAD0
LINKON/PHYAD1
VDD2
CRS
AVSS1
TXN
ACTIVITY/PHYAD2
FDUPLEX/PHYAD3
VSS3
TXP
AVSS2
AVDD1
RXN
XTAL2
CLKIN/XTAL1
VSS4
RXP
NC2
nRST
AVDD2
AVSS3
EXRES1
AVSS4
AVDD3
AVSS5
AVDD4
NC1
MDIO
MDC
VSS5
RXD3
RXD2
RXD1
RXD0
SMSC LAN83C185
11
Rev. 0.8 (11-16-04)
DATASHEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Chapter 3 Pin Description
This chapter describes in detail the functionality of each of the five main architectural blocks.
The term “block” defines a stand-alone entity on the floor plan of the chip.
3.1
I/O Signals
I
– Input. Digital TTL levels.
– Output. Digital TTL levels.
– Input. Analog levels.
O
AI
AO – Output. Analog levels.
AI/O – Input or Output. Analog levels.
Note: Reset as used in the signal descriptions is defined as nRST being active low.
Configuration inputs are listed in parenthesis.
Table 3.1 MII Signals
PIN NO.
SIGNAL NAME
TYPE
DESCRIPTION
41
TXD0
TXD1
TX_EN
I
I
I
Transmit Data 0: Bit 0 of the 4 data bits that are accepted
by the PHY for transmission.
42
39
35
Transmit Data 1: Bit 1 of the 4 data bits that are accepted
by the PHY for transmission.
Transmit Enable: Indicates that valid data is presented
on the TXD[3:0] signals, for transmission.
RX_ER
(RXD4)
O
O
Receive Error: Asserted to indicate that an error was
detected somewhere in the frame presently being
transferred from the PHY.
In Symbol Interface (5B Decoding) mode, this signal is the
MII Receive Data 4: the MSB of the received 5-bit symbol
code-group.
47
32
31
44
45
COL
O
O
O
I
MII Collision Detect: Asserted to indicate detection of
collision condition.
RXD0
RXD1
TXD2
TXD3
Receive Data 0: Bit 0 of the 4 data bits that are sent by
the PHY in the receive path.
Receive Data 1: Bit 1 of the 4 data bits that are sent by
the PHY in the receive path.
Transmit Data 2: Bit 2 of the 4 data bits that are accepted
by the PHY for transmission.
I
Transmit Data 3: Bit 3 of the 4 data bits that are accepted
by the PHY for transmission.
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA1S2HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 3.1 MII Signals (continued)
PIN NO.
SIGNAL NAME
TYPE
DESCRIPTION
37
TX_ER
(TXD4)
I
I
MII Transmit Error: When driven high, the 4B/5B encode
process substitutes the Transmit Error code-group (/H/)
for the encoded data word. This input is ignored in
10BaseT operation.
In Symbol Interface (5B Decoding) mode, this signal
becomes the MII Transmit Data 4: the MSB of the 5-bit
symbol code-group.
48
33
CRS
O
O
Carrier Sense: Indicate detection of carrier.
RX_DV
Receive Data Valid: Indicates that recovered and
decoded data nibbles are being presented on RXD[3:0].
30
29
38
34
RXD2
RXD3
O
O
O
O
Receive Data 2: Bit 2 of the 4 data bits that sent by the
PHY in the receive path.
Receive Data 3: Bit 3 of the 4 data bits that sent by the
PHY in the receive path.
TX_CLK
RX_CLK
Transmit Clock: 25MHz in 100Base-TX mode. 2.5MHz in
10Base-T mode.
Receive Clock: 25MHz in 100Base-TX mode. 2.5MHz in
10Base-T mode.
Table 3.2 LED Signals
TYPE
PIN NO.
SIGNAL NAME
DESCRIPTION
16
SPEED100
O
LED1 – SPEED100 indication. Active indicates that the
selected speed is 100Mbps. Inactive indicates that the
selected speed is 10Mbps.
17
19
20
LINKON
O
O
O
LED2 – LINK ON indication. Active indicates that the Link
(100Base-TX or 10Base-T) is on.
ACTIVITY
FDUPLEX
LED3 – ACTIVITY indication. Active indicates that there
is Carrier sense (CRS) from the active PMD.
LED4 – DUPLEX indication. Active indicates that the PHY
is in full-duplex mode.
Table 3.3 Management Signals
TYPE DESCRIPTION
PIN NO.
SIGNAL NAME
26
MDIO
MDC
IO
Management Data Input/OUTPUT: Serial management
data input/output.
27
I
Management Clock: Serial management clock.
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA1S3HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 3.4 Configuration Inputs
PIN NO.
SIGNAL NAME
PHYAD4
TYPE
DESCRIPTION
2
I
I
I
I
I
I
PHY Address Bit 4: set the default address of the PHY.
PHY Address Bit 3: set the default address of the PHY.
PHY Address Bit 2: set the default address of the PHY.
PHY Address Bit 1: set the default address of the PHY.
PHY Address Bit 0: set the default address of the PHY.
20
19
17
16
6
PHYAD3
PHYAD2
PHYAD1
PHYAD0
MODE2
PHY Operating Mode Bit 2: set the default MODE of the
PHY. See Section 5.4.9.2, "Mode Bus – MODE[2:0]," on
page 47 for the MODE options.
5
4
MODE1
MODE0
I
I
PHY Operating Mode Bit 1: set the default MODE of the
PHY. See Section 5.4.9.2, "Mode Bus – MODE[2:0]," on
page 47 for the MODE options.
PHY Operating Mode Bit 0: set the default MODE of the
PHY. See Section 5.4.9.2, "Mode Bus – MODE[2:0]," on
page 47 for the MODE options.
10
9
TEST1
I
I
I
Test Mode Select 1: Must be left floating.
Test Mode Select 0: Must be left floating.
TEST0
12
REG_EN
Internal +1.8V Regulator Enable:
+3.3V – Enables internal regulator.
0V – Disables internal regulator.
Table 3.5 General Signals
TYPE
PIN NO.
SIGNAL NAME
DESCRIPTION
46
25
nINT
OD
I
LAN Interrupt – Active Low output.
nRST
External Reset – input of the system reset. This signal is
active LOW.
23
22
11
CLKIN/XTAL1
XTAL2
I
Clock Input – 25 MHz external clock or crystal input.
Clock Output – 25 MHz crystal output.
O
I
CLK_FREQ
Clock Frequency – define the frequency of the input
clock CLKIN
0 – Clock frequency is 25 MHz.
1 – Reserved.
This input needs to be held low continuously, during and
after reset. This pin should be pulled-down to VSS via a
pull-down resistor.
64
3
NC1
No Connect
GPO2
O
O
General Purpose Output 2 – General Purpose Output
signal Driven by bits in registers 27 and 31.
2
GPO1
General Purpose Output 1 – General Purpose Output
signal Driven by bits in registers 27 and 31.
(Muxed with PHYAD4 signal)
Rev. 0.8 (11-16-04)
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 3.5 General Signals (continued)
PIN NO.
SIGNAL NAME
TYPE
DESCRIPTION
1
GPO0
O
General Purpose Output 0 – General Purpose Output
signal. Driven by bits in registers 27 and 31.
(Muxed with MII Select) This pin should be pulled-down
or left floating – Do Not Pull Up.
Table 3.6 10/100 Line Interface
TYPE
PIN NO.
SIGNAL NAME
DESCRIPTION
51
TXP
TXN
RXP
RXN
AO
AO
AI
Transmit Data: 100Base-TX or 10Base-T differential
transmit outputs to magnetics.
50
55
54
Transmit Data: 100Base-TX or 10Base-T differential
transmit outputs to magnetics.
Receive Data: 100Base-TX or 10Base-T differential
receive inputs from magnetics.
AI
Receive Data: 100Base-TX or 10Base-T differential
receive inputs from magnetics.
Table 3.7 Analog References
TYPE
PIN NO.
SIGNAL NAME
DESCRIPTION
59
EXRES1
AI
Connects to reference resistor of value 12.4K-Ohm, 1%
connected to digital GND.
Table 3.8 Analog Test Bus
TYPE
PIN NO.
SIGNAL NAME
DESCRIPTION
DESCRIPTION
56
NC2
AI/O
No Connect
Table 3.9 Power Signals
TYPE
PIN NO.
SIGNAL NAME
53
57
61
63
49
52
58
AVDD1
AVDD2
AVDD3
AVDD4
AVSS1
AVSS2
AVSS3
Power
Power
Power
Power
Power
Power
Power
+3.3V Analog Power
+3.3V Analog Power
+3.3V Analog Power
+3.3V Analog Power
Analog Ground
Analog Ground
Analog Ground
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Table 3.9 Power Signals (continued)
PIN NO.
SIGNAL NAME
TYPE
DESCRIPTION
60
62
13
14
AVSS4
AVSS5
VREG
Power
Power
Power
Power
Analog Ground
Analog Ground
+3.3V Internal Regulator Input Voltage
VDD_CORE
+1.8V Ring (Core voltage) - required for capacitance
connection.
8
VDD1
VDD2
VDD3
VSS1
VSS2
VSS3
VSS4
VSS5
VSS6
VSS7
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
+3.3V Digital Power
+3.3V Digital Power
+3.3V Digital Power
Digital Ground (GND)
Digital Ground (GND)
Digital Ground (GND)
Digital Ground (GND)
Digital Ground (GND)
Digital Ground (GND)
Digital Ground (GND)
18
43
7
15
21
24
28
36
40
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Chapter 4 Architecture Details
4.1
Top Level Functional Architecture
Functionally, the PHY can be divided into the following sections:
■
■
■
■
■
100Base-TX transmit and receive
10Base-T transmit and receive
MII interface to the controller
Auto-negotiation to automatically determine the best speed and duplex possible
Management Control to read status registers and write control registers
100M
PLL
TX_CLK
(for MII)
MAC
4B/5B
Encoder
Scrambler
and PISO
25MHz
by 4 bits
25MHz by
5 bits
MII 25 MHz by 4 bits
MII
125 Mbps Serial
NRZI
MLT-3
Tx
Driver
NRZI
MLT-3
MLT-3
Magnetics
Converter
Converter
MLT-3
MLT-3
RJ45
CAT-5
Figure 4.1 100Base-TX Data Path
4.2
100Base-TX Transmit
The data path of the 100Base-TX is shown in Figure 4.1. Each major block is explained below.
4.2.1
100M Transmit Data across the MII
The MAC controller drives the transmit data onto the TXD bus and asserts TX_EN to indicate valid
data. The data is latched by the PHY’s MII block on the rising edge of TX_CLK. The data is in the
form of 4-bit wide 25MHz data.
4.2.2
4B/5B Encoding
The transmit data passes from the MII block to the 4B/5B encoder. This block encodes the data from
4-bit nibbles to 5-bit symbols (known as “code-groups”) according to Table 4.1. Each 4-bit data-nibble
is mapped to 16 of the 32 possible code-groups. The remaining 16 code-groups are either used for
control information or are not valid.
The first 16 code-groups are referred to by the hexadecimal values of their corresponding data nibbles,
0 through F. The remaining code-groups are given letter designations with slashes on either side. For
example, an IDLE code-group is /I/, a transmit error code-group is /H/, etc.
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
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The encoding process may be bypassed by clearing bit 6 of register 31. When the encoding is
bypassed the 5th transmit data bit is equivalent to TX_ER.
Note that encoding can be bypassed only when the MAC interface is configured to operate in MII
mode.
Table 4.1 4B/5B Code Table
CODE
RECEIVER
TRANSMITTER
GROUP
SYM
INTERPRETATION
INTERPRETATION
11110
01001
10100
10101
01010
01011
01110
01111
10010
10011
10110
10111
11010
11011
11100
11101
11111
11000
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
I
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
DATA
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
DATA
IDLE
Sent after /T/R until TX_EN
Sent for rising TX_EN
J
First nibble of SSD, translated to “0101”
following IDLE, else RX_ER
10001
01101
K
T
Second nibble of SSD, translated to
“0101” following J, else RX_ER
Sent for rising TX_EN
Sent for falling TX_EN
First nibble of ESD, causes de-assertion
of CRS if followed by /R/, else assertion
of RX_ER
00111
R
Second nibble of ESD, causes
deassertion of CRS if following /T/, else
assertion of RX_ER
Sent for falling TX_EN
00100
00110
11001
00000
00001
H
V
V
V
V
Transmit Error Symbol
Sent for rising TX_ER
INVALID
INVALID, RX_ER if during RX_DV
INVALID, RX_ER if during RX_DV
INVALID, RX_ER if during RX_DV
INVALID, RX_ER if during RX_DV
INVALID
INVALID
INVALID
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 4.1 4B/5B Code Table (continued)
CODE
RECEIVER
TRANSMITTER
GROUP
SYM
INTERPRETATION
INTERPRETATION
00010
00011
00101
01000
01100
10000
V
V
V
V
V
V
INVALID, RX_ER if during RX_DV
INVALID, RX_ER if during RX_DV
INVALID, RX_ER if during RX_DV
INVALID, RX_ER if during RX_DV
INVALID, RX_ER if during RX_DV
INVALID, RX_ER if during RX_DV
INVALID
INVALID
INVALID
INVALID
INVALID
INVALID
4.2.3
Scrambling
Repeated data patterns (especially the IDLE code-group) can have power spectral densities with large
narrow-band peaks. Scrambling the data helps eliminate these peaks and spread the signal power
more uniformly over the entire channel bandwidth. This uniform spectral density is required by FCC
regulations to prevent excessive EMI from being radiated by the physical wiring.
The seed for the scrambler is generated from the PHY address, PHYAD[4:0], ensuring that in multiple-
PHY applications, such as repeaters or switches, each PHY will have its own scrambler sequence.
The scrambler also performs the Parallel In Serial Out conversion (PISO) of the data.
4.2.4
4.2.5
NRZI and MLT3 Encoding
The scrambler block passes the 5-bit wide parallel data to the NRZI converter where it becomes a
serial 125MHz NRZI data stream. The NRZI is encoded to MLT-3. MLT3 is a tri-level code where a
change in the logic level represents a code bit “1” and the logic output remaining at the same level
represents a code bit “0”.
100M Transmit Driver
The MLT3 data is then passed to the analog transmitter, which launches the differential MLT-3 signal,
on outputs TXP and TXN, to the twisted pair media via a 1:1 ratio isolation transformer. The 10Base-
T and 100Base-TX signals pass through the same transformer so that common “magnetics” can be
used for both. The transmitter drives into the 100Ω impedance of the CAT-5 cable. Cable termination
and impedance matching require external components.
4.2.6
100M Phase Lock Loop (PLL)
The 100M PLL locks onto reference clock and generates the 125MHz clock used to drive the 125 MHz
logic and the 100Base-Tx Transmitter.
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100M
PLL
RX_CLK
MAC
MII 25MHz by 4
bits
25MHz
4B/5B
Descrambler
and SIPO
25MHz by
5 bits
MII
by 4 bits
Decoder
125 Mbps Serial
DSP: Timing
MLT-3
Converter
NRZI
MLT-3
recovery, Equalizer
and BLW Correction
NRZI
Converter
A/D
MLT-3
MLT-3
MLT-3
Magnetics
RJ45
CAT-5
Converter
6 bit Data
Figure 4.2 Receive Data Path
4.3
100Base-TX Receive
The receive data path is shown in Figure 4.2. Detailed descriptions are given below.
4.3.1
100M Receive Input
The MLT-3 from the cable is fed into the PHY (on inputs RXP and RXN) via a 1:1 ratio transformer.
The ADC samples the incoming differential signal at a rate of 125M samples per second. Using a 64-
level quanitizer it generates 6 digital bits to represent each sample. The DSP adjusts the gain of the
ADC according to the observed signal levels such that the full dynamic range of the ADC can be used.
4.3.2
Equalizer, Baseline Wander Correction and Clock and Data Recovery
The 6 bits from the ADC are fed into the DSP block. The equalizer in the DSP section compensates
for phase and amplitude distortion caused by the physical channel consisting of magnetics, connectors,
and CAT- 5 cable. The equalizer can restore the signal for any good-quality CAT-5 cable between 1m
and 150m.
If the DC content of the signal is such that the low-frequency components fall below the low frequency
pole of the isolation transformer, then the droop characteristics of the transformer will become
significant and Baseline Wander (BLW) on the received signal will result. To prevent corruption of the
received data, the PHY corrects for BLW and can receive the ANSI X3.263-1995 FDDI TP-PMD
defined “killer packet” with no bit errors.
The 100M PLL generates multiple phases of the 125MHz clock. A multiplexer, controlled by the timing
unit of the DSP, selects the optimum phase for sampling the data. This is used as the received
recovered clock. This clock is used to extract the serial data from the received signal.
4.3.3
NRZI and MLT-3 Decoding
The DSP generates the MLT-3 recovered levels that are fed to the MLT-3 converter. The MLT-3 is then
converted to an NRZI data stream.
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
4.3.4
Descrambling
The descrambler performs an inverse function to the scrambler in the transmitter and also performs
the Serial In Parallel Out (SIPO) conversion of the data.
During reception of IDLE (/I/) symbols. the descrambler synchronizes its descrambler key to the
incoming stream. Once synchronization is achieved, the descrambler locks on this key and is able to
descramble incoming data.
Special logic in the descrambler ensures synchronization with the remote PHY by searching for IDLE
symbols within a window of 4000 bytes (40us). This window ensures that a maximum packet size of
1514 bytes, allowed by the IEEE 802.3 standard, can be received with no interference. If no IDLE-
symbols are detected within this time-period, receive operation is aborted and the descrambler re-starts
the synchronization process.
The descrambler can be bypassed by setting bit 0 of register 31.
4.3.5
4.3.6
Alignment
The de-scrambled signal is then aligned into 5-bit code-groups by recognizing the /J/K/ Start-of-Stream
Delimiter (SSD) pair at the start of a packet. Once the code-word alignment is determined, it is stored
and utilized until the next start of frame.
5B/4B Decoding
The 5-bit code-groups are translated into 4-bit data nibbles according to the 4B/5B table. The
translated data is presented on the RXD[3:0] signal lines. The SSD, /J/K/, is translated to “0101 0101”
as the first 2 nibbles of the MAC preamble. Reception of the SSD causes the PHY to assert the RX_DV
signal, indicating that valid data is available on the RXD bus. Successive valid code-groups are
translated to data nibbles. Reception of either the End of Stream Delimiter (ESD) consisting of the /T/R/
symbols, or at least two /I/ symbols causes the PHY to de-assert carrier sense and RX_DV.
These symbols are not translated into data.
The decoding process may be bypassed by clearing bit 6 of register 31. When the decoding is
bypassed the 5th receive data bit is driven out on RX_ER/RXD4. Decoding may be bypassed only
when the MAC interface is in MII mode.
4.3.7
Receive Data Valid Signal
The Receive Data Valid signal (RX_DV) indicates that recovered and decoded nibbles are being
presented on the RXD[3:0] outputs synchronous to RX_CLK. RX_DV becomes active after the /J/K/
delimiter has been recognized and RXD is aligned to nibble boundaries. It remains active until either
the /T/R/ delimiter is recognized or link test indicates failure or SIGDET becomes false.
RX_DV is asserted when the first nibble of translated /J/K/ is ready for transfer over the Media
Independent Interface (MII).
J
K
5
5
5
D
Idle
data data data data
T
R
CLEAR-TEXT
RX_CLK
RX_DV
5
5
5
5
5
D
data data data data
RXD
Figure 4.3 Relationship Between Received Data and Some MII Signals
SMSC LAN83C185
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DATA2S1HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
4.3.8
4.3.9
Receiver Errors
During a frame, unexpected code-groups are considered receive errors. Expected code groups are the
DATA set (0 through F), and the /T/R/ (ESD) symbol pair. When a receive error occurs, the RX_ER
signal is asserted and arbitrary data is driven onto the RXD[3:0] lines. Should an error be detected
during the time that the /J/K/ delimiter is being decoded (bad SSD error), RX_ER is asserted true and
the value ‘1110’ is driven onto the RXD[3:0] lines. Note that the Valid Data signal is not yet asserted
when the bad SSD error occurs.
100M Receive Data across the MII
The 4-bit data nibbles are sent to the MII block. These data nibbles are clocked to the controller at a
rate of 25MHz. The controller samples the data on the rising edge of RX_CLK. To ensure that the
setup and hold requirements are met, the nibbles are clocked out of the PHY on the falling edge of
RX_CLK. RX_CLK is the 25MHz output clock for the MII bus. It is recovered from the received data
to clock the RXD bus. If there is no received signal, it is derived from the system reference clock
(CLKIN).
When tracking the received data, RX_CLK has a maximum jitter of 0.8ns (provided that the jitter of the
input clock, CLKIN, is below 100ps).
4.4
10Base-T Transmit
Data to be transmitted comes from the MAC layer controller. The 10Base-T transmitter receives 4-bit
nibbles from the MII at a rate of 2.5MHz and converts them to a 10Mbps serial data stream. The data
stream is then Manchester-encoded and sent to the analog transmitter, which drives a signal onto the
twisted pair via the external magnetics.
The 10M transmitter uses the following blocks:
■
■
■
■
MII (digital)
TX 10M (digital)
10M Transmitter (analog)
10M PLL (analog)
4.4.1
10M Transmit Data across the MII
The MAC controller drives the transmit data onto the TXD BUS. When the controller has driven TX_EN
high to indicate valid data, the data is latched by the MII block on the rising edge of TX_CLK. The data
is in the form of 4-bit wide 2.5MHz data.
In order to comply with legacy 10Base-T MAC/Controllers, in Half-duplex mode the PHY loops back
the transmitted data, on the receive path. This does not confuse the MAC/Controller since the COL
signal is not asserted during this time. The PHY also supports the SQE (Heartbeat) signal. See Section
5.4.2, "Collision Detect," on page 44 for more details.
4.4.2
4.4.3
Manchester Encoding
The 4-bit wide data is sent to the TX10M block. The nibbles are converted to a 10Mbps serial NRZI
data stream. The 10M PLL locks onto the external clock or internal oscillator and produces a 20MHz
clock. This is used to Manchester encode the NRZ data stream. When no data is being transmitted
(TX_EN is low, the TX10M block outputs Normal Link Pulses (NLPs) to maintain communications with
the remote link partner.
10M Transmit Drivers
The Manchester encoded data is sent to the analog transmitter where it is shaped and filtered before
being driven out as a differential signal across the TXP and TXN outputs.
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
4.5
10Base-T Receive
The 10Base-T receiver gets the Manchester- encoded analog signal from the cable via the magnetics.
It recovers the receive clock from the signal and uses this clock to recover the NRZI data stream. This
10M serial data is converted to 4-bit data nibbles which are passed to the controller across the MII at
a rate of 2.5MHz.
This 10M receiver uses the following blocks:
■
■
■
■
Filter and SQUELCH (analog)
10M PLL (analog)
RX 10M (digital)
MII (digital)
4.5.1
4.5.2
10M Receive Input and Squelch
The Manchester signal from the cable is fed into the PHY (on inputs RXP and RXN) via 1:1 ratio
magnetics. It is first filtered to reduce any out-of-band noise. It then passes through a SQUELCH
circuit. The SQUELCH is a set of amplitude and timing comparators that normally reject differential
voltage levels below 300mV and detect and recognize differential voltages above 585mV.
Manchester Decoding
The output of the SQUELCH goes to the RX10M block where it is validated as Manchester encoded
data. The polarity of the signal is also checked. If the polarity is reversed (local RXP is connected to
RXN of the remote partner and vice versa), then this is identified and corrected. The reversed condition
is indicated by the flag “XPOL“, bit 4 in register 27. The 10M PLL is locked onto the received
Manchester signal and from this, generates the received 20MHz clock. Using this clock, the
Manchester encoded data is extracted and converted to a 10MHz NRZI data stream. It is then
converted from serial to 4-bit wide parallel data.
The RX10M block also detects valid 10Base-T IDLE signals - Normal Link Pulses (NLPs) - to maintain
the link.
4.5.3
4.5.4
10M Receive Data across the MII
The 4 bit data nibbles are sent to the MII block. In MII mode, these data nibbles are valid on the rising
edge of the 2.5 MHz RX_CLK.
Jabber detection
Jabber is a condition in which a station transmits for a period of time longer than the maximum
permissible packet length, usually due to a fault condition, that results in holding the TX_EN input for
a long period. Special logic is used to detect the jabber state and abort the transmission to the line,
within 45ms. Once TX_EN is deasserted, the logic resets the jabber condition.
Bit 1.1 indicates that a jabber condition was detected.
4.6
MAC Interface
The MII (Media Independent Interface) block is responsible for the communication with the controller.
Special sets of hand-shake signals are used to indicate that valid received/transmitted data is present
on the 4 bit receive/transmit bus.
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Datasheet
4.6.1
MII
The MII includes 16 interface signals:
■
■
■
■
■
■
■
■
■
■
transmit data - TXD[3:0]
transmit strobe - TX_EN
transmit clock - TX_CLK
transmit error - TX_ER/TXD4
receive data - RXD[3:0]
receive strobe - RX_DV
receive clock - RX_CLK
receive error - RX_ER/RXD4
collision indication - COL
carrier sense - CRS
In MII mode, on the transmit path, the PHY drives the transmit clock, TX_CLK, to the controller. The
controller synchronizes the transmit data to the rising edge of TX_CLK. The controller drives TX_EN
high to indicate valid transmit data. The controller drives TX_ER high when a transmit error is detected.
On the receive path, the PHY drives both the receive data, RXD[3:0], and the RX_CLK signal. The
controller clocks in the receive data on the rising edge of RX_CLK when the PHY drives RX_DV high.
The PHY drives RX_ER high when a receive error is detected.
4.7
Auto-negotiation
The purpose of the Auto-negotiation function is to automatically configure the PHY to the optimum link
parameters based on the capabilities of its link partner. Auto-negotiation is a mechanism for
exchanging configuration information between two link-partners and automatically selecting the highest
performance mode of operation supported by both sides. Auto-negotiation is fully defined in clause 28
of the IEEE 802.3 specification.
Once auto-negotiation has completed, information about the resolved link can be passed back to the
controller via the Serial Management Interface (SMI). The results of the negotiation process are
reflected in the Speed Indication bits in register 31, as well as the Link Partner Ability Register
(Register 5).
The auto-negotiation protocol is a purely physical layer activity and proceeds independently of the MAC
controller.
The advertised capabilities of the PHY are stored in register 4 of the SMI registers. The default
advertised by the PHY is determined by user-defined on-chip signal options.
The following blocks are activated during an Auto-negotiation session:
■
■
■
■
■
■
■
Auto-negotiation (digital)
100M ADC (analog)
100M PLL (analog)
100M equalizer/BLW/clock recovery (DSP)
10M SQUELCH (analog)
10M PLL (analog)
10M Transmitter (analog)
When enabled, auto-negotiation is started by the occurrence of one of the following events:
■
Hardware reset
Software reset
■
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
■
■
■
Power-down reset
Link status down
Setting register 0, bit 9 high (auto-negotiation restart)
On detection of one of these events, the PHY begins auto-negotiation by transmitting bursts of Fast
Link Pulses (FLP). These are bursts of link pulses from the 10M transmitter. They are shaped as
Normal Link Pulses and can pass uncorrupted down CAT-3 or CAT-5 cable. A Fast Link Pulse Burst
consists of up to 33 pulses. The 17 odd-numbered pulses, which are always present, frame the FLP
burst. The 16 even-numbered pulses, which may be present or absent, contain the data word being
transmitted. Presence of a data pulse represents a “1”, while absence represents a “0”.
The data transmitted by an FLP burst is known as a “Link Code Word.” These are defined fully in IEEE
802.3 clause 28. In summary, the PHY advertises 802.3 compliance in its selector field (the first 5 bits
of the Link Code Word). It advertises its technology ability according to the bits set in register 4 of the
SMI registers.
There are 4 possible matches of the technology abilities. In the order of priority these are:
■
■
■
■
100M Full Duplex (Highest priority)
100M Half Duplex
10M Full Duplex
10M Half Duplex
If the full capabilities of the PHY are advertised (100M, Full Duplex), and if the link partner is capable
of 10M and 100M, then auto-negotiation selects 100M as the highest performance mode. If the link
partner is capable of Half and Full duplex modes, then auto-negotiation selects Full Duplex as the
highest performance operation.
Once a capability match has been determined, the link code words are repeated with the acknowledge
bit set. Any difference in the main content of the link code words at this time will cause auto-negotiation
to re-start. Auto-negotiation will also re-start if not all of the required FLP bursts are received.
The capabilities advertised during auto-negotiation by the PHY are initially determined by the logic
levels latched on the MODE[2:0] bus after reset completes. This bus can also be used to disable auto-
negotiation on power-up.
Writing register 4 bits [8:5] allows software control of the capabilities advertised by the PHY. Writing
register 4 does not automatically re-start auto-negotiation. Register 0, bit 9 must be set before the new
abilities will be advertised. Auto-negotiation can also be disabled via software by clearing register 0,
bit 12.
The LAN83C185 does not support “Next Page" capability.
4.7.1
Parallel Detection
If the LAN83C185 is connected to a device lacking the ability to auto-negotiate (i.e. no FLPs are
detected), it is able to determine the speed of the link based on either 100M MLT-3 symbols or 10M
Normal Link Pulses. In this case the link is presumed to be Half Duplex per the IEEE standard. This
ability is known as “Parallel Detection. This feature ensures interoperability with legacy link partners.
If a link is formed via parallel detection, then bit 0 in register 6 is cleared to indicate that the Link
Partner is not capable of auto-negotiation. The controller has access to this information via the
management interface. If a fault occurs during parallel detection, bit 4 of register 6 is set.
Register 5 is used to store the Link Partner Ability information, which is coded in the received FLPs.
If the Link Partner is not auto-negotiation capable, then register 5 is updated after completion of parallel
detection to reflect the speed capability of the Link Partner.
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA2S5HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
4.7.2
Re-starting Auto-negotiation
Auto-negotiation can be re-started at any time by setting register 0, bit 9. Auto-negotiation will also re-
start if the link is broken at any time. A broken link is caused by signal loss. This may occur because
of a cable break, or because of an interruption in the signal transmitted by the Link Partner. Auto-
negotiation resumes in an attempt to determine the new link configuration.
If the management entity re-starts Auto-negotiation by writing to bit 9 of the control register, the
LAN83C185 will respond by stopping all transmission/receiving operations. Once the break_link_timer
is done, in the Auto-negotiation state-machine (approximately 1200ms) the auto-negotiation will re-
start. The Link Partner will have also dropped the link due to lack of a received signal, so it too will
resume auto-negotiation.
4.7.3
4.7.4
Disabling Auto-negotiation
Auto-negotiation can be disabled by setting register 0, bit 12 to zero. The device will then force its
speed of operation to reflect the information in register 0, bit 13 (speed) and register 0, bit 8 (duplex).
The speed and duplex bits in register 0 should be ignored when auto-negotiation is enabled.
Half vs. Full Duplex
Half Duplex operation relies on the CSMA/CD (Carrier Sense Multiple Access / Collision Detect)
protocol to handle network traffic and collisions. In this mode, the carrier sense signal, CRS, responds
to both transmit and receive activity. In this mode, If data is received while the PHY is transmitting,
a collision results.
In Full Duplex mode, the PHY is able to transmit and receive data simultaneously. In this mode, CRS
responds only to receive activity. The CSMA/CD protocol does not apply and collision detection is
disabled.
4.8
PHY Management Control
The Management Control module includes 3 blocks:
■
■
■
Serial Management Interface (SMI)
Management Registers Set
Interrupt
4.8.1
Serial Management Interface (SMI)
The Serial Management Interface is used to control the LAN83C185 and obtain its status. This
interface supports registers 0 through 6 as required by Clause 22 of the 802.3 standard, as well as
“vendor-specific” registers 16 to 31 allowed by the specification. Non-supported registers (7 to 15) will
be read as hexadecimal “FFFF”.
At the system level there are 2 signals, MDIO and MDC where MDIO is bi-directional open-drain and
MDC is the clock.
A special feature (enabled by register 17 bit 3) forces the PHY to disregard the PHY-Address in the
SMI packet causing the PHY to respond to any address. This feature is useful in multi-PHY
applications and in production testing, where the same register can be written in all the PHYs using a
single write transaction.
The MDC signal is an aperiodic clock provided by the station management controller (SMC). The MDIO
signal receives serial data (commands) from the controller SMC, and sends serial data (status) to
the SMC. The minimum time between edges of the MDC is 160 ns. There is no maximum time
between edges.
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA2S6HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
The minimum cycle time (time between two consecutive rising or two consecutive falling edges) is 400
ns. These modest timing requirements allow this interface to be easily driven by the I/O port of a
microcontroller.
The data on the MDIO line is latched on the rising edge of the MDC. The frame structure and timing
of the data is shown in Figure 4.4 and Figure 4.5.
The timing relationships of the MDIO signals are further described in Section 6.1, "Serial
Management Interface (SMI) Timing," on page 51.
Read Cycle
MDC
MDI0
...
...
D1
D15 D14
D0
32 1's
0
1
1
0
A4 A3 A2 A1 A0 R4 R3 R2 R1 R0
Start of
Frame
OP
Code
Turn
Preamble
PHY Address
Register Address
Data
Around
Data To Phy
Data From Phy
Figure 4.4 MDIO Timing and Frame Structure - READ Cycle
Write Cycle
MDC
...
...
D15 D14
D1
D0
32 1's
0
1
0
1
A4 A3 A2 A1 A0 R4 R3 R2 R1 R0
PHY Address Register Address
MDIO
Start of
Frame
OP
Code
Turn
Preamble
Data
Around
Data To Phy
Figure 4.5 MDIO Timing and Frame Structure - WRITE Cycle
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA2S7HEET
Chapter 5 Registers
Table 5.1 Control Register: Register 0 (Basic)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
Loopback
Speed Select
A/N Enable
Power Down
Isolate
Restart A/N
Duplex Mode
Collision Test
Reserved
Table 5.2 Status Register: Register 1 (Basic)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
100Base-
T4
100Base-
100Base-
TX
10Base-T
Full
10Base-T
Half
Reserved
A/N
Remote
Fault
A/N
Link
Jabber
Detect
Extended
Capability
TX
Complete
Ability
Status
Full Duplex
Half
Duplex
Duplex
Duplex
Table 5.3 PHY ID 1 Register: Register 2 (Extended)
15
14
13
13
12
11
10
9
8
7
6
5
4
4
3
3
2
1
0
0
PHY ID Number (Bits 3-18 of the Organizationally Unique Identifier - OUI)
Table 5.4 PHY ID 2 Register: Register 3 (Extended)
15
14
12
11
10
9
8
7
6
5
2
1
PHY ID Number (Bits 19-24 of the Organizationally Unique
Identifier - OUI)
Manufacturer Model Number
Manufacturer Revision Number
Table 5.5 Auto-Negotiation Advertisement: Register 4 (Extended)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Next
Reserved
Remote
Fault
Reserved
Symmetric
Pause
Asymmetric
Pause
100Base-T4
100Base-TX
Full Duplex
100Base-
TX
10Base-T
Full
10Base-T
IEEE 802.3 Selector Field
Page
Operation
Operation
Duplex
Table 5.6 Auto-Negotiation Link Partner Base Page Ability Register: Register 5 (Extended)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Next
Acknowledge
Remote
Fault
Reserved
Pause
100Base-T4
100Base-TX
Full Duplex
100Base-TX
10Base-T
10Base-T
IEEE 802.3 Selector Field
Page
Full Duplex
Table 5.7 Auto-Negotiation Expansion Register: Register 6 (Extended)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
Parallel
Detect
Fault
Link
Partner
Next Page
Able
Next Page
Able
Page
Link
Received
Partner
A/N Able
Table 5.8 Auto-Negotiation Link Partner Next Page Transmit Register: Register 7 (Extended)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
Note: Next Page capability is not supported.
Table 5.9 Register 8 (Extended)
15
15
14
14
13
13
12
12
11
11
10
10
9
8
7
6
5
5
4
4
3
3
2
2
1
1
0
0
IEEE Reserved
Table 5.10 Register 9 (Extended)
9
8
7
6
IEEE Reserved
Table 5.11 Register 10 (Extended)
15
15
15
15
15
15
14
14
14
14
14
14
13
13
13
13
13
13
12
12
12
12
12
12
11
11
11
11
11
11
10
10
10
10
10
10
9
8
7
6
5
5
5
5
5
5
4
4
4
4
4
4
3
3
3
3
3
3
2
2
2
2
2
2
1
1
1
1
1
1
0
0
0
0
0
0
IEEE Reserved
Table 5.12 Register 11 (Extended)
9
8
7
6
IEEE Reserved
Table 5.13 Register 12 (Extended)
9
8
7
6
IEEE Reserved
Table 5.14 Register 13 (Extended)
9
8
7
6
IEEE Reserved
Table 5.15 Register 14 (Extended)
9
8
7
6
IEEE Reserved
Table 5.16 Register 15 (Extended)
9
8
7
6
IEEE Reserved
Table 5.17 Silicon Revision Register 16: Vendor-Specific
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
Silicon Revision
Reserved
Table 5.18 Mode Control/ Status Register 17: Vendor-Specific
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
FASTRIP
EDPWRDOWN
Reserved
LOWSQEN
MDPREBP
FARLOOPBACK
FASTEST
Reserved
REFCLKEN
PHYADBP
Force
Good
Link
ENERGYON
Reserved
Status
Table 5.19 Special Modes Register 18: Vendor-Specific
15
14
13
12
11
10
9
8
7
6
5
4
3
2
2
2
1
0
MIIMODE
CLKSELFREQ
DSPBP
SQBP
Reserved
PLLBP
ADCBP
MODE
PHYAD
Table 5.20 Reserved Register 19: Vendor-Specific
15
14
13
13
12
11
11
10
9
8
7
6
5
4
4
3
1
1
0
Reserved
Table 5.21 TSTCNTL Register 20: Vendor-Specific
15
14
12
10
9
8
7
6
5
3
0
READ
WRITE
Reserved
TEST
READ ADDRESS
WRITE ADDRESS
MODE
Table 5.22 TSTREAD2 Register 21: Vendor-Specific
15
15
15
15
15
15
14
14
14
14
14
14
13
13
13
13
13
13
12
12
12
12
12
12
11
11
11
11
11
11
10
9
8
7
6
5
4
4
4
4
4
4
3
3
3
3
3
3
2
2
2
2
2
2
1
1
1
1
1
1
0
0
0
0
0
0
READ_DATA
Table 5.23 TSTREAD1 Register 22: Vendor-Specific
10
9
8
7
6
5
READ_DATA
Table 5.24 TSTWRITE Register 23: Vendor-Specific
10
10
10
10
9
8
7
6
5
5
5
5
WRITE_DATA
Table 5.25 Register 24: Vendor-Specific
9
8
7
6
Reserved
Table 5.26 Register 25: Vendor-Specific
9
8
7
6
Reserved
Table 5.27 Register 26: Vendor-Specific
9
8
7
6
Reserved
Table 5.28 Special Control/Status Indications Register 27: Vendor-Specific
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
SWRST_FAST
SQEOFF
VCOOFF_LP
Reserved
Reserved
Reserved
Reserved
Reserved
XPOL
AUTONEGS
Table 5.29 Special Internal Testability Control Register 28: Vendor-Specific
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
Table 5.30 Interrupt Source Flags Register 29: Vendor-Specific
15
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
INT7
INT6
INT5
INT4
INT3
INT2
INT1
Reserved
Table 5.31 Interrupt Mask Register 30: Vendor-Specific
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
Mask Bits
Table 5.32 PHY Special Control/Status Register 31: Vendor-Specific
15
Reserved
14
Reserved
13
12
11
10
9
8
7
6
5
4
3
2
1
Reserved
0
Special
Autodone
Reserved
GPO2
GPO1
GPO0
Enable
4B5B
Reserved
Speed Indication
Scramble
Disable
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
5.1
SMI Register Mapping
The following registers are supported (register numbers are in decimal):
Table 5.33 SMI Register Mapping
REGISTER #
DESCRIPTION
Basic Control Register
GROUP
0
Basic
1
Basic Status Register
Basic
2
PHY Identifier 1
Extended
Extended
Extended
Extended
Extended
3
PHY Identifier 2
4
Auto-Negotiation Advertisement Register
Auto-Negotiation Link Partner Ability Register
Auto-Negotiation Expansion Register
Silicon Revision Register
5
6
16
17
18
20
21
22
23
27
28
29
30
31
Vendor-specific
Vendor-specific
Vendor-specific
Vendor-specific
Vendor-specific
Vendor-specific
Vendor-specific
Vendor-specific
Vendor-specific
Vendor-specific
Vendor-specific
Vendor-specific
Mode Control/Status Register
Special Modes
TSTCNTL – Testability/Configuration Control
TSTREAD1 – Testability data Read for LSB
TSTREAD2 – Testability data Read for MSB
TSTWRITE – Testability/Configuration data Write
Control / Status Indication Register
Special internal testability controls
Interrupt Source Register
Interrupt Mask Register
PHY Special Control/Status Register
5.2
SMI Register Format
The mode key is as follows:
■
RW = read/write,
■
■
■
■
■
■
SC = self clearing,
WO = write only,
RO = read only,
LH = latch high, clear on read of register,
LL = latch low, clear on read of register,
NASR = Not Affected by Software Reset
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA3S4HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.34 Register 0 - Basic Control
ADDRESS
NAME
Reset
DESCRIPTION
MODE
DEFAULT
0.15
1 = software reset. Bit is self-clearing. For best results,
when setting this bit do not set other bits in this
register.
RW/
SC
0
0.14
0.13
Loopback
1 = loopback mode,
0 = normal operation
RW
RW
0
Speed Select
1 = 100Mbps,
Set by
MODE[2:0]
bus
0 = 10Mbps.
Ignored if Auto Negotiation is enabled (0.12 = 1).
0.12
Auto-
1 = enable auto-negotiate process
(overrides 0.13 and 0.8)
RW
Set by
MODE[2:0]
bus
Negotiation
Enable
0 = disable auto-negotiate process
0.11
0.10
Power Down
1 = General power down mode,
0 = normal operation
RW
RW
0
Isolate
1 = electrical isolation of PHY from MII
0 = normal operation
Set by
MODE[2:0]
bus
0.9
0.8
Restart Auto-
Negotiate
1 = restart auto-negotiate process
RW/
SC
0
0 = normal operation. Bit is self-clearing.
Duplex Mode
1 = Full duplex,
RW
Set by
MODE[2:0]
bus
0 = Half duplex.
Ignored if Auto Negotiation is enabled (0.12 = 1).
0.7
Collision Test
Reserved
1 = enable COL test,
0 = disable COL test
RW
RO
0
0.6:0
0
Table 5.35 Register 1 - Basic Status
DESCRIPTION
ADDRESS
NAME
MODE
DEFAULT
1.15
100Base-T4
1 = T4 able,
RO
0
0 = no T4 ability
1.14
1.13
1.12
1.11
100Base-TX Full
Duplex
1 = TX with full duplex,
RO
RO
RO
RO
1
1
1
1
0 = no TX full duplex ability
100Base-TX Half
Duplex
1 = TX with half duplex,
0 = no TX half duplex ability
10Base-T Full
Duplex
1 = 10Mbps with full duplex
0 = no 10Mbps with full duplex ability
10Base-T Half
Duplex
1 = 10Mbps with half duplex
0 = no 10Mbps with half duplex ability
1.10:6
1.5
Reserved
Auto-Negotiate
Complete
1 = auto-negotiate process completed
RO
0
0
0 = auto-negotiate process not completed
1.4
Remote Fault
1 = remote fault condition detected
0 = no remote fault
RO/
LH
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA3S5HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.35 Register 1 - Basic Status (continued)
ADDRESS
NAME
DESCRIPTION
MODE
DEFAULT
1.3
Auto-Negotiate
Ability
1 = able to perform auto-negotiation function
0 = unable to perform auto-negotiation function
RO
1
1.2
1.1
1.0
Link Status
1 = link is up,
RO/
LL
0
0
1
0 = link is down
Jabber Detect
1 = jabber condition detected
RO/
LH
0 = no jabber condition detected
Extended
1 = supports extended capabilities registers
RO
Capabilities
0 = does not support extended capabilities registers
Table 5.36 Register 2 - PHY Identifier 1
DESCRIPTION
ADDRESS
NAME
MODE DEFAULT
RW 0007h
2.15:0
PHY ID Number
Assigned to the 3rd through 18th bits of the
Organizationally Unique Identifier (OUI), respectively.
OUI=00800Fh
Table 5.37 Register 3 - PHY Identifier 2
DESCRIPTION
ADDRESS
NAME
MODE DEFAULT
3.15:10
3.9:4
PHY ID Number
Model Number
Revision Number
Assigned to the 19th through 24th bits of the OUI.
Six-bit manufacturer’s model number.
RW
RW
RW
C0h
0Ah
1h
3.3:0
Four-bit manufacturer’s revision number.
Table 5.38 Register 4 - Auto Negotiation Advertisement
NAME DESCRIPTION
ADDRESS
MODE
DEFAULT
4.15
Next Page
1 = next page capable,
RO
0
0 = no next page ability
This Phy does not support next page ability.
4.14
4.13
Reserved
RO
RW
0
0
Remote Fault
1 = remote fault detected,
0 = no remote fault
4.12
Reserved
4.11:10
Pause Operation
00 = No PAUSE
R/W
RO
00
0
01 = Asymmetric PAUSE toward link partner
10 = Symmetric PAUSE
11 = Both Symmetric PAUSE and Asymmetric
PAUSE toward local device
4.9
100Base-T4
1 = T4 able,
0 = no T4 ability
This Phy does not support 100Base-T4.
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA3S6HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.38 Register 4 - Auto Negotiation Advertisement (continued)
ADDRESS
NAME
DESCRIPTION
MODE
DEFAULT
4.8
100Base-TX Full
Duplex
1 = TX with full duplex,
RW
Set by
MODE[2:0]
bus
0 = no TX full duplex ability
4.7
4.6
100Base-TX
1 = TX able,
RW
RW
1
0 = no TX ability
10Base-T Full
Duplex
1 = 10Mbps with full duplex
Set by
MODE[2:0]
bus
0 = no 10Mbps with full duplex ability
4.5
10Base-T
1 = 10Mbps able,
RW
RW
Set by
MODE[2:0]
bus
0 = no 10Mbps ability
4.4:0
Selector Field
[00001] = IEEE 802.3
00001
Table 5.39 Register 5 - Auto Negotiation Link Partner Ability
NAME DESCRIPTION
Next Page
ADDRESS
MODE DEFAULT
5.15
1 = “Next Page” capable,
RO
0
0 = no “Next Page” ability
This Phy does not support next page ability.
5.14
5.13
Acknowledge
Remote Fault
1 = link code word received from partner
0 = link code word not yet received
RO
RO
0
0
1 = remote fault detected,
0 = no remote fault
5.12:11
5.10
Reserved
RO
RO
0
0
Pause Operation
1 = Pause Operation is supported by remote MAC,
0 = Pause Operation is not supported by remote MAC
5.9
100Base-T4
1 = T4 able,
RO
0
0 = no T4 ability.
This Phy does not support T4 ability.
5.8
100Base-TX Full
Duplex
1 = TX with full duplex,
RO
RO
RO
RO
RO
0
0 = no TX full duplex ability
5.7
100Base-TX
1 = TX able,
0
0 = no TX ability
5.6
10Base-T Full
Duplex
1 = 10Mbps with full duplex
0
0 = no 10Mbps with full duplex ability
5.5
10Base-T
1 = 10Mbps able,
0
0 = no 10Mbps ability
5.4:0
Selector Field
[00001] = IEEE 802.3
00001
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA3S7HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.40 Register 6 - Auto Negotiation Expansion
ADDRESS
NAME
Reserved
DESCRIPTION
MODE DEFAULT
6.15:5
6.4
RO
0
0
Parallel Detection
Fault
1 = fault detected by parallel detection logic
0 = no fault detected by parallel detection logic
RO/
LH
6.3
6.2
6.1
6.0
Link Partner Next
Page Able
1 = link partner has next page ability
RO
0
0
0
0
0 = link partner does not have next page ability
Next Page Able
1 = local device has next page ability
RO
0 = local device does not have next page ability
Page Received
1 = new page received
RO/
LH
0 = new page not yet received
Link Partner Auto- 1 = link partner has auto-negotiation ability
RO
Negotiation Able
0 = link partner does not have auto-negotiation ability
Table 5.41 Register 16 - Silicon Revision
DESCRIPTION
ADDRESS
NAME
MODE DEFAULT
16.15:10
16.9:6
Reserved
RO
RO
RO
0
Silicon Revision
Reserved
Four-bit silicon revision identifier.
0001
0
16.5:0
Table 5.42 Register 17 - Mode Control/Status
ADDRESS
NAME
DESCRIPTION
MODE DEFAULT
17.15
17.14
Reserved
FASTRIP
Write as 0; ignore on read.
RW
0
0
10Base-T fast mode:
0 = normal operation
1 = Reserved
RW,
NASR
Must be left at 0
17.13
EDPWRDOWN
Enable the Energy Detect Power-Down mode:
0 = Energy Detect Power-Down is disabled
1 = Energy Detect Power-Down is enabled
RW
0
17.12
17.11
Reserved
Write as 0, ignore on read
RW
RW
0
0
LOWSQEN
The Low_Squelch signal is equal to LOWSQEN AND
EDPWRDOWN.
Low_Squelch = 1 implies a lower threshold
(more sensitive).
Low_Squelch = 0 implies a higher threshold
(less sensitive).
17.10
17.9
MDPREBP
Reserved
Management Data Preamble Bypass:
0 – detect SMI packets with Preamble
1 – detect SMI packets without preamble
RW
RW
0
0
Reserved
Must be left at 0
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA3S8HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.42 Register 17 - Mode Control/Status (continued)
ADDRESS
NAME
FASTEST
DESCRIPTION
MODE DEFAULT
17.8
Auto-Negotiation Test Mode
RW
0
0 = normal operation
1 = activates test mode
17.7:5
17.4
Reserved
Reserved
Write as 0, ignore on read.
Reserved
RW
RW
RW
0
0
0
Must be left at 0
17.3
17.2
PHYADBP
1 = PHY disregards PHY address in SMI access
write.
Force
0 = normal operation;
Good Link Status
1 = force 100TX- link active;
Note:
This bit should be set only during lab testing
17.1
17.0
ENERGYON
Reserved
ENERGYON – indicates whether energy is detected
on the line (see Section 5.4.5.2, "Energy Detect
Power-Down," on page 44); it goes to “0” if no valid
energy is detected within 256ms. Reset to “1” by
hardware reset, unaffected by SW reset.
RO
RW
1
0
Write as “0”. Ignore on read.
Table 5.43 Register 18 - Special Modes
DESCRIPTION
ADDRESS
NAME
MODE DEFAULT
18.15:14
MIIMODE
MII Mode: set the mode of the MII:
0 – MII interface.
RW,
NASR
1 – Reserved
18.13
CLKSELFREQ
Clock In Selected Frequency. Set the requested input
clock frequency. This bit drives signal that goes to
external logic of the Phy and select the desired
frequency of the input clock:
RO,
NASR
0 – the clock frequency is 25MHz
1 – Reserved
18.12
18.11
18.10
18.9
DSPBP
SQBP
DSP Bypass mode. Used only in special lab tests.
SQUELCH Bypass mode.
RW,
0
0
NASR
RW,
NASR
Reserved
PLLBP
ADCBP
MODE
RW,
NASR
PLL Bypass mode.
ADC Bypass mode.
RW,
NASR
18.8
RW,
NASR
18.7:5
PHY Mode of operation. Refer to Section 5.4.9.2,
"Mode Bus – MODE[2:0]," on page 47 for more
details.
RW,
NASR
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.43 Register 18 - Special Modes (continued)
ADDRESS
NAME
PHYAD
DESCRIPTION
MODE DEFAULT
18.4:0
PHY Address.
RW,
PHYAD
The PHY Address is used for the SMI address and for
the initialization of the Cipher (Scrambler) key. Refer
to Section 5.4.9.1, "Physical Address Bus -
NASR
PHYAD[4:0]," on page 46 for more details.
Table 5.44 Register 20 - TSTCNTL
DESCRIPTION
ADDRESS
NAME
READ
MODE DEFAULT
20.15
When setting this bit to “1”, the content of the register
that is selected by the READ ADDRESS will be
latched to the TSTREAD1/2 registers. This bit is self-
cleared.
RW
0
20.14
WRITE
When setting this bit to “1”, the register that is selected
by the WRITE ADDRESS is going to be written with
the data from the TSTWRITE register. This bit is self-
cleared.
RW
0
20.13:11
20.10
Reserved
TEST MODE
Enable the Testability/Configuration mode:
0 - Testability/Configuration mode disabled
1 - Testability/Configuration mode enabled
RW
RW
RW
0
0
0
20.9:5
20.4:0
READ
The address of the Testability/Configuration register
that will be latched into the TSTREAD1 and
TSTREAD2 registers
ADDRESS
WRITE
The address of the Testability/Configuration register
that will be written.
ADDRESS
Table 5.45 Register 21 - TSTREAD1
DESCRIPTION
ADDRESS
NAME
MODE DEFAULT
RO
21.15:0
READ_DATA
When reading registers with a size of less then 16
bits, this register contain the register data, starting
from bit 0.
0
When reading registers with a size of more then 16
bits, this register contain the less significant 16 bits of
the register data.
Table 5.46 Register 22 - TSTREAD2
DESCRIPTION
ADDRESS
NAME
MODE DEFAULT
22.15:0
READ_DATA
When reading registers with a size of less then 16
bits, this register clears to zeros.
RO
0
When reading registers with a size of more then 16
bits, this register contains the most significant bits of
the register data, starting from the 16th bit.
Rev. 0.8 (11-16-04)
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.47 Register 23 - TSTWRITE
ADDRESS
NAME
DESCRIPTION
MODE DEFAULT
RW
23.15:0
WRITE_DATA
This field contains the data that will be written to a
specific register on the “Programming” transaction.
0
Table 5.48 Register 27 - Special Control/Status Indications
ADDRESS
NAME
DESCRIPTION
MODE DEFAULT
27.15:13
27.12
Reserved
RW
RW
0
0
SWRST_FAST
1 = Accelerates SW reset counter from 256 ms to 10
us for production testing.
27:11
27:10
SQEOFF
Disable the SQE test (Heartbeat):
0 - SQE test is enabled.
RW,
0
0
NASR
1 - SQE test is disabled.
VCOOFF_LP
Forces the Receive PLL 10M to lock on the reference
clock at all times:
RW,
NASR
0 - Receive PLL 10M can lock on reference or line as
needed (normal operation)
1 - Receive PLL 10M is locked on the reference clock.
In this mode 10M data packets cannot be received.
27.9
27.8
27.7
27.6
27.5
27.4
Reserved
Reserved
Reserved
Reserved
Reserved
XPOL
Write as 0. Ignore on read.
Write as 0. Ignore on read.
Write as 0. Ignore on read
Write as 0. Ignore on read.
Write as 0. Ignore on read.
RW
RW
RW
RW
RW
RO
0
0
0
0
Polarity state of the 10Base-T:
0 - Normal polarity
0
1 - Reversed polarity
27.3:0
AUTONEGS
Auto-negotiation “ARB” State-machine state
RO
1011
Table 5.49 Register 28 - Special Internal Testability Controls
ADDRESS
NAME
Reserved
DESCRIPTION
MODE DEFAULT
RW N/A
28.15:0
Do not write to this register. Ignore on read.
Table 5.50 Register 29 - Interrupt Source Flags
ADDRESS
NAME
Reserved
DESCRIPTION
MODE DEFAULT
29.15:8
Ignore on read.
RO/
LH
0
29.7
INT7
1 = ENERGYON generated
0 = not source of interrupt
RO/
LH
0
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.50 Register 29 - Interrupt Source Flags (continued)
ADDRESS
NAME
DESCRIPTION
MODE DEFAULT
29.6
INT6
INT5
INT4
INT3
INT2
INT1
1 = Auto-Negotiation complete
RO/
LH
0
0
0
0
0
0
0
0 = not source of interrupt
29.5
29.4
29.3
29.2
29.1
29.0
1 = Remote Fault Detected
0 = not source of interrupt
RO/
LH
1 = Link Down (link status negated)
0 = not source of interrupt
RO/
LH
1 = Auto-Negotiation LP Acknowledge
0 = not source of interrupt
RO/
LH
1 = Parallel Detection Fault
0 = not source of interrupt
RO/
LH
1 = Auto-Negotiation Page Received
0 = not source of interrupt
RO/
LH
Reserved
RO/
LH
Table 5.51 Register 30 - Interrupt Mask
ADDRESS
NAME
DESCRIPTION
MODE DEFAULT
30.15:8
30.7:0
Reserved
Mask Bits
Write as 0; ignore on read.
RO
RW
0
0
1 = interrupt source is enabled
0 = interrupt source is masked
Table 5.52 Register 31 - PHY Special Control/Status
ADDRESS
NAME
DESCRIPTION
MODE DEFAULT
31.15
31.14
31.13
31.12
Reserved
Reserved
Special
Do not write to this register. Ignore on read.
RW
0
Must be set to 0
RW
RO
0
0
Autodone
Auto-negotiation done indication:
0 = Auto-negotiation is not done or disabled (or not
active)
1 = Auto-negotiation is done
31.11:10
31.9:7
Reserved
GPO[2:0]
RW
RW
0
0
General Purpose Output connected to signals
GPO[2:0]
31.6
31.5
Enable 4B5B
Reserved
0 = Bypass encoder/decoder.
RW
RW
1
0
1 = enable 4B5B encoding/decoding.
MAC Interface must be configured in MII mode.
Write as 0, ignore on Read.
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA4S2HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.52 Register 31 - PHY Special Control/Status (continued)
ADDRESS
NAME
DESCRIPTION
MODE DEFAULT
31.4:2
Speed Indication
HCDSPEED value:
RO
000
[001]=10Mbps Half-duplex
[101]=10Mbps Full-duplex
[010]=100Base-TX Half-duplex
[110]=100Base-TX Full-duplex
31.1
31.0
Reserved
Write as 0; ignore on Read
RW
RW
0
0
Scramble Disable
0 = enable data scrambling
1 = disable data scrambling,
5.3
Management Interrupt
The Management interface supports an interrupt capability that is not a part of the IEEE 802.3
specification. It generates an active low interrupt signal on the nINT output whenever certain events
are detected. Reading the Interrupt Source register (Register 29) shows the source of the interrupt,
and clears the interrupt output signal. The Interrupt Mask register (Register 30) enables for each
source to set (LOW) the nINT, by asserting the corresponding mask bit. The Mask bit does not mask
the source bit in register 29. At reset, all bits are masked (negated). The nINT is an asynchronous
output.
INTERRUPT SOURCE
ENERGYON activated
SOURCE/MASK REG BIT #
7
6
5
4
3
2
1
Auto-Negotiate Complete
Remote Fault Detected
Link Status negated (not asserted)
Auto-Negotiation LP Acknowledge
Parallel Detection Fault
Auto-Negotiation Page Received
5.4
Miscellaneous Functions
5.4.1
Carrier Sense
The carrier sense is output on CRS. CRS is a signal defined by the MII specification in the IEEE 802.3u
standard. The PHY asserts CRS based only on receive activity whenever the PHY is either in repeater
mode or full-duplex mode. Otherwise the PHY asserts CRS based on either transmit or receive activity.
The carrier sense logic uses the encoded, unscrambled data to determine carrier activity status. It
activates carrier sense with the detection of 2 non-contiguous zeros within any 10 bit span. Carrier
sense terminates if a span of 10 consecutive ones is detected before a /J/K/ Start-of Stream Delimiter
pair. If an SSD pair is detected, carrier sense is asserted until either /T/R/ End–of-Stream Delimiter
pair or a pair of IDLE symbols is detected. Carrier is negated after the /T/ symbol or the first IDLE. If
/T/ is not followed by /R/, then carrier is maintained. Carrier is treated similarly for IDLE followed by
some non-IDLE symbol.
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
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5.4.2
Collision Detect
A collision is the occurrence of simultaneous transmit and receive operations. The COL output is
asserted to indicate that a collision has been detected. COL remains active for the duration of the
collision. COL is changed asynchronously to both RX_CLK and TX_CLK. The COL output becomes
inactive during full duplex mode.
COL may be tested by setting register 0, bit 7 high. This enables the collision test. COL will be asserted
within 512 bit times of TX_EN rising and will be de-asserted within 4 bit times of TX_EN falling.
In 10M mode, COL pulses for approximately 10 bit times (1us), 2us after each transmitted packet (de-
assertion of TX_EN). This is the Signal Quality Error (SQE) signal and indicates that the transmission
was successful. The user can disable this pulse by setting bit 11 in register 27.
5.4.3
5.4.4
Isolate Mode
The PHY data paths may be electrically isolated from the MII by setting register 0, bit 10 to a logic
one. In isolation mode, the PHY does not respond to the TXD, TX_EN and TX_ER inputs. The PHY
still responds to management transactions.
Isolation provides a means for multiple PHYs to be connected to the same MII without contention
occurring. The PHY is not isolated on power-up (bit 0:10 = 0).
Link integrity Test
The LAN83C185 performs the link integrity test as outlined in the IEEE 802.3u (Clause 24-15) Link
Monitor state diagram. The link status is multiplexed with the 10Mbps link status to form the reportable
link status bit in Serial Management Register 1, and is driven to the LINKON LED.
The DSP indicates a valid MLT-3 waveform present on the RXP and RXN signals as defined by the
ANSI X3.263 TP-PMD standard, to the Link Monitor state-machine, using internal signal called
DATA_VALID. When DATA_VALID is asserted the control logic moves into a Link-Ready state, and
waits for an enable from the Auto Negotiation block. When received, the Link-Up state is entered, and
the Transmit and Receive logic blocks become active. Should Auto Negotiation be disabled, the link
integrity logic moves immediately to the Link-Up state, when the DATA_VALID is asserted.
Note that to allow the line to stabilize, the link integrity logic will wait a minimum of 330 µsec from the
time DATA_VALID is asserted until the Link-Ready state is entered. Should the DATA_VALID input be
negated at any time, this logic will immediately negate the Link signal and enter the Link-Down state.
When the 10/100 digital block is in 10Base-T mode, the link status is from the 10Base-T receiver logic.
5.4.5
Power-Down modes
There are 2 power-down modes for the Phy:
5.4.5.1
General Power-Down
This power-down is controlled by register 0, bit 11. In this mode the entire PHY, except the
management interface, is powered-down and stays in that condition as long as bit 0.11 is HIGH. When
bit 0.11 is cleared, the PHY powers up and is automatically reset.
5.4.5.2
Energy Detect Power-Down
This power-down mode is activated by setting bit 17.13 to 1. In this mode when no energy is present
on the line the PHY is powered down, except for the management interface, the SQUELCH circuit and
the ENERGYON logic. The ENERGYON logic is used to detect the presence of valid energy from
100Base-TX, 10Base-T, or Auto-negotiation signals
In this mode, when the ENERGYON signal is low, the PHY is powered-down, and nothing is
transmitted. When energy is received - link pulses or packets - the ENERGYON signal goes high, and
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
the PHY powers-up. It automatically resets itself into the state it had prior to power-down, and asserts
the nINT interrupt if the ENERGYON interrupt is enabled. The first and possibly the second packet
to activate ENERGYON may be lost.
When 17.13 is low, energy detect power-down is disabled.
5.4.6
Reset
The PHY has 3 reset sources:
Hardware reset (HWRST): connected to the nRST input, and to the internal POR signal.
If the nRST input is driven by an external source, it should be held LOW for at least 100 us to ensure
that the Phy is properly reset.
The Phy has an internal Power-On-Reset (POR) signal which is asserted for 21ms following a VDD
(+3.3V) and VDDCORE (+1.8V) power-up. This internal POR can be bypassed only in certain
production test modes. This internal POR is internally “OR”-ed with the nRST input.
During a Hardware reset, either external or POR, an external clock must be supplied to the CLKIN
signal.
Software (SW) reset: Activated by writing register 0, bit 15 high. This signal is self- clearing. After the
register-write, internal logic extends the reset by 256µs to allow PLL-stabilization before releasing the
logic from reset.
The IEEE 802.3u standard, clause 22 (22.2.4.1.1) states that the reset process should be completed
within 0.5s from the setting of this bit.
Power-Down reset: Automatically activated when the PHY comes out of power-down mode. The
internal power-down reset is extended by 256µs after exiting the power-down mode to allow the PLLs
to stabilize before the logic is released from reset.
These 3 reset sources are combined together in the digital block to create the internal “general reset”,
SYSRST, which is an asynchronous reset and is active HIGH. This SYSRST directly drives the PCS,
DSP and MII blocks. It is also input to the Central Bias block in order to generate a short reset for the
PLLs.
The SMI mechanism and registers are reset only by the Hardware and Software resets. During Power-
Down, the SMI registers are not reset. Note that some SMI register bits are not cleared by Software
reset – these are marked “NASR” in the register tables.
For the first 16us after coming out of reset, the MII will run at 2.5 MHz. After that it will switch to 25
MHz if auto-negotiation is enabled.
5.4.7
LED Description
The PHY provides four LED signals. These provide a convenient means to determine the mode of
operation of the Phy. All LED signals are either active high or active low.
Note: The four LED signals can be either active-high or active-low. Polarity depends upon the Phy
address latched in on reset. The LAN83C185 senses each Phy address bit and changes the
polarity of the LED signal accordingly. If the address bit is set as level “1”, the LED polarity will
be set to an active-low. If the address bit is set as level “0”, the LED polarity will be set to an
active-high.
SMSC LAN83C185
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Phy Address = 1
LED output = active low
Phy Address = 0
LED output = active high
VDD
LED1-LED4
~10K ohms
~270 ohms
~270 ohms
LED1-LED4
Figure 5.1 PHY Address Strapping on LEDS
The ACTIVITY LED output is driven active when CRS is active (high). When CRS becomes inactive,
the Activity LED output is extended by 128ms.
The LINKON LED output is driven active whenever the PHY detects a valid link. The use of the
10Mbps or 100Mbps link test status is determined by the condition of the internally determined speed
selection.
The SPEED100 LED output is driven active when the operating speed is 100Mbit/s or during Auto-
negotiation. This LED will go inactive when the operating speed is 10Mbit/s or during line isolation
(register 31 bit 5).
The Full-Duplex LED output is driven active low when the link is operating in Full-Duplex mode.
5.4.8
Loopback Operation
The 10/100 digital has two independent loop-back modes: Internal loopback and far loopback.
5.4.8.1
Internal Loopback
The internal loopback mode is enabled by setting bit register 0 bit 14 to logic one. In this mode, the
scrambled transmit data (output of the scrambler) is looped into the receive logic (input of the
descrambler). The COL signal will be inactive in this mode, unless collision test (bit 0.7) is active.
In this mode, during transmission (TX_EN is HIGH), nothing is transmitted to the line and the
transmitters are powered down.
5.4.9
Configuration Signals
The PHY has 11 configuration signals whose inputs should be driven continuously, either by external
logic or external pull-up/pull-down resistors.
5.4.9.1
Physical Address Bus - PHYAD[4:0]
The PHYAD[4:0] signals are driven high or low to give each PHY a unique address. This address is
latched into an internal register at end of hardware reset. In a multi-PHY application (such as a
repeater), the controller is able to manage each PHY via the unique address. Each PHY checks each
management data frame for a matching address in the relevant bits. When a match is recognized, the
PHY responds to that particular frame. The PHY address is also used to seed the scrambler. In a multi-
PHY application, this ensures that the scramblers are out of synchronization and disperses the
electromagnetic radiation across the frequency spectrum.
Rev. 0.8 (11-16-04)
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DATA4S6HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
5.4.9.2
Mode Bus – MODE[2:0]
The MODE[2:0] bus controls the configuration of the 10/100 digital block.
Table 5.53 MODE[2:0] Bus
DEFAULT REGISTER BIT VALUES
MODE[2:0]
MODE DEFINITIONS
REGISTER 0
[13,12,10,8]
REGISTER 4
[8,7,6,5]
000
001
010
10Base-T Half Duplex. Auto-negotiation disabled.
10Base-T Full Duplex. Auto-negotiation disabled.
0000
0001
1000
N/A
N/A
N/A
100Base-TX Half Duplex. Auto-negotiation
disabled.
CRS is active during Transmit & Receive.
011
100
100Base-TX Full Duplex. Auto-negotiation disabled.
CRS is active during Receive.
1001
1100
N/A
100ase-TX Half Duplex is advertised. Auto-
negotiation enabled.
0100
CRS is active during Transmit & Receive.
101
Repeater mode. Auto-negotiation enabled.
100Base-TX Half Duplex is advertised.
CRS is active during Receive.
1100
0100
110
111
Power Down mode. In this mode the PHY wake-up
in Power-Down mode.
N/A
N/A
All capable. Auto-negotiation enabled.
X10X
1111
5.5
Analog
The analog blocks of the chip are described in this section.
5.5.1
ADC
The ADC is a 6 bit 125 MHz sample rate Analog to Digital Converter designed to serve as the analog
front end of a digital 100Base-Tx receiver.
5.5.1.1
Functional Description
The ADC has a full flash architecture for maximum speed and minimum latency. An internally
generated 125MHz clock is used to time the sampling and processing.
The ADC has a variable gain, which is controlled by the DSP block. This allows accurate A/D
conversion over the entire range of input signal amplitudes, which is particularly important for lower
amplitude signals (longer cables).
INPUT COMMON MODE
The differential input is applied to the RXP/N signals. For proper operation of the ADC the input
common mode should match the internal differential reference common mode. To achieve this, the
ADC generates the appropriate voltage and drives it via the VCOM signal.
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5.5.1.2
General Characteristics
ITEM
SPEC
UNITS
REMARK
Full Scale Input voltage
Input Common Mode
3.0 Differential (peak-to-peak)
1.6-2.0
V
V
Gain dependent.
5.5.2
100M PLL
Three main functions are included in the 100M PLL: a clock multiplier to generate a 125MHz clock, a
phase interpolator to synchronize the receive clock to the receive data, and a transmit wave-shaping
delay reference.
5.5.2.1
Functional Description
The clock multiplier generates a multiple phase 125MHz from a 25MHz reference frequency.
The phase interpolator uses a multiplexer to select the phase used as the receive clock, RX_CLK. The
multiplexer is controlled by signals generated in the DSP Timing unit. The Timing unit estimates the
frequency drift of the received data clock and, by incrementing, decrementing or maintaining the
selected phase, it generates a clock that is synchronized to the received data stream.
The 100M PLL also generates a fixed phase 125MHz clock, slaved to the VCO, that is used by the
digital filter for accurate wave-shaping of the transmit output. It is also used as the transmitter clock of
the PHY, TX_CLK. (This clock must be jitter-free thus cannot be the receive clock).
5.5.3
MT_100
This block generates the differential outputs driven onto TXP/TXN in 100Base-TX mode.
5.5.3.1
Functional Description
This block is a wave-shaped 100BASE-TX transmitter, with high impedance current outputs. The three
level differential output (MLT-3) is shaped by differential current switches whose outputs are connected
together. The low pass filtering (wave-shaping) of the current output is done by progressive switching
of small current sources. The timing reference for the wave-shaping is the 125MHz fixed clock from
the 100M PLL. The transmitter is designed to operate with a 1:1 transformer.
5.5.4
5.5.5
5.5.6
10M Squelch
The squelch circuit consists of squelch comparators and data comparators, which operate according
to the 802.3 standard in Section 14.3.1.3.2.
10BT Filter
The 10BASE-T Low Pass Filter is the front end of 10BASE-T signal path. It is designed to reject the
high frequency noise from entering the squelch and data recovery blocks.
10M PLL - Data Recovery Clock
The data recovery Phase Locked Loop (PLL) is used for data recovery for the 10BASE-T mode of
operation. The data recovery PLL is used to synchronize the phase of the 10BASE-T data and the
20MHz VCO.
Rev. 0.8 (11-16-04)
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High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
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5.5.6.1
Functional Description
The Data recovery PLL has two modes of operation: Frequency Mode and Data Mode.
In frequency mode, the VCO locks to the external reference clock.
In Data mode, the VCO locks to the incoming data. When the PLL switches to Data mode, the VCO
is held. It is released on an incoming data edge. This provides a minimum amount of phase error when
the PLL switches from Frequency Mode to Data Mode.
5.5.7
PLL 10M - Transmit Clock
The transmit Phase Locked Loop (PLL) is used to generate a precise delay for the 10BASE-T
transmitter. It also provides a 20MHz clock for the transmit digital block.
5.5.7.1
Functional Description
This PLL is used to provide a Transmit clock to the digital and create a delay for the 10BASE-T
transmitter.
The Transmit PLL operates continuously in a frequency mode of operation where it is locked to the
input clock.
5.5.8
XMT_10
This block generates the differential outputs driven onto TXP/TXN in 10Base-T mode.
5.5.8.1
Functional Description
This block is a wave-shaped 10BASE-T transmitter, with high impedance current outputs. The low pass
filtering (wave-shaping) of the current output is done by progressive switching of small current sources.
The timing reference for the wave-shaping is the 10BASE-T transmit PLL. The transmitter is designed
to operate with a 1:1 turn-ratio transformer.
5.5.9
Central Bias
The Central Bias block generates a power-up reset signal, a PLL reset signal and the bias
currents/voltages needed by other on-chip blocks.
5.5.9.1
Functional Description
This block has three main functions: Reference bias current and voltage generator, power-up reset,
and PLL reset.
The bias generator generates accurate currents and voltages using an on-chip bandgap circuit and an
external 12.4K 1% resistor.
The power-up reset circuit generates a signal that stays high for 10 ms. This duration is controlled
through the use of counters and a 25MHz internal clock. An analog power-up circuit is used to set the
initial conditions and ensure proper startup of the circuit.
The PLL reset signal is generated after the occurrence of an active nRST. The internal reset signal is
asserted for the duration of four 25MHz clocks (160ns). It is then released. Releasing the PLL reset
early ensures that the PLL locks to the reference clock before the system reset (nRST) is released.
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Rev. 0.8 (11-16-04)
DATA4S9HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
5.6
DSP Block
5.6.1
General Description
The “DSP Block” includes the following modules:
DSP Core (Equalizer, Timing and BLW correction), Testability / Configuration module (Testability /
Configuration control), Testability / Configuration Registers (not including any SMI registers) and the
Multiplexers (for the testability / configuration signals).
The details of the DSP core are described in the DSP architecture specification. The Testability /
Configuration features give access to the status and control of most of the internal registers in the DSP.
The status and control mechanisms are described in the architecture specification.
5.6.2
ADC Gray code converting
The LAN83C185 ADC generates a 6 bit “modified” Gray code. Normal Gray code outputs number in
the range of 0 to 2n – 1. The 6-bit code generates numbers from 0 to 63 (decimal).
The MLT3 analog input has a voltage range of –1V to +1V. It is necessary to translate this to -32 to
+31 on the output of the ADC. Thus the Gray Code is modified by offsetting it by -32. This is translated
to 2’s complement before being presented to the DSP.
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA5S0HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Chapter 6 Electrical Characteristics
The timing diagrams and limits in this section define the requirements placed on the external signals
of the Phy.
6.1
Serial Management Interface (SMI) Timing
MDC
T1.1
MDIO
T1.2
(Write)
Valid Data
MDIO
T1.3
T1.4
(Read)
Valid Data
PARAMETER
DESCRIPTION
MDC frequency
MIN
TYP
MAX
2.5
300
UNITS
NOTES
T1.1
T1.2
T1.3
T1.4
MHz
ns
MDC to MDIO (Write) delay
MDIO (Read) to MDC setup
MDIO (Read) to MDC hold
0
10
10
ns
ns
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA5S1HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
6.2
100Base-TX Timings
6.2.1
100M MII Receive Timing
RX_CLK
RXD[3:0]
RX_DV
RX_ER
Valid Data
T2.1
T2.2
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNITS
NOTES
T2.1
Receive signals setup to RX_CLK
rising
10
ns
T2.2
Receive signals hold from
RX_CLK rising
10
ns
RX_CLK frequency
RX_CLK Duty-Cycle
25
40
MHz
%
6.2.2
100M MII Transmit Timing
TX_CLK
TXD[3:0]
TX_EN
TX_ER
Valid Data
T3.1
T3.2
PARAMETER
DESCRIPTION
MIN
12
TYP
MAX
UNITS
NOTES
T3.1
Transmit signals setup to TX_CLK
rising
ns
T3.2
Transmit signals hold after
TX_CLK rising
0
ns
TX_CLK frequency
TX_CLK Duty-Cycle
25
40
MHz
%
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA5S2HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
6.3
10Base-T Timings
6.3.1
10M MII Receive Timing
RX_CLK
RXD[3:0]
RX_DV
RX_ER
Valid Data
T4.1
T4.2
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNITS
ns
NOTES
T4.1
Receive signals setup to RX_CLK
rising
10
T4.2
Receive signals hold from RX_CLK
rising
10
ns
RX_CLK frequency
RX_CLK Duty-Cycle
25
40
MHz
%
Receive signals setup to RX_CLK
rising
10
ns
6.3.2
10M MII Transmit Timing
TX_CLK
TXD[3:0]
TX_EN
Valid Data
T5.1
T5.2
PARAMETER
DESCRIPTION
MIN
12
TYP
MAX
UNITS
NOTES
T5.1
Transmit signals setup to
TX_CLK rising
ns
T5.2
Transmit signals hold after
TX_CLK rising
0
ns
TX_CLK frequency
TX_CLK Duty-Cycle
2.5
50
MHz
%
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA5S3HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
6.4
Reset Timing
T6.1
nRST
T6.2
T6.3
Configuration
signals
T6.4
Output drive
PARAMETER
DESCRIPTION
Reset Pulse Width
MIN
TYP
MAX
UNITS
NOTES
T6.1
T6.2
100
200
us
ns
Configuration input setup to
nRST rising
T6.3
T6.4
Configuration input hold after
nRST rising
400
20
ns
ns
Output Drive after nRST rising
800
20 clock cycles for
25 MHz clock
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA5S4HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
6.5
DC Characteristics
6.5.1
Operating Conditions
Supply Voltage
+3.3V +/- 10%
0°C to 70°C
Operating Temperature
6.5.2
Power Consumption
6.5.2.1
Power Consumption Device Only
Power measurements taken under the following conditions:
Temperature:
Device VDD:
+25° C
+3.30 V
Table 6.1 Power Consumption Device Only
REGULATOR
DIGITAL POWER
ANALOG POWER
SUPPLY CURRENT
Total
Power
(mW)
Power
(mW)
Current
(mA)
Power
(mW)
Current
(mA)
Power
(mW)
Current
(mA)
Mode
10BASE-T Operation
10BASE-T /w traffic
Idle
96
83
45
45
22
33
20
17
17
17
10
6
59
59
18
18
4
4
4
4
4
1
1
1
1
1
Energy Detect Power Down
AN General Power Down
Non-AN Gen Power Down
5
24
7
5
24
7
5
0.66
0.200
100BASE-TX Operation
100BASE-TX /w traffic
Idle
261
245
45
66
50
17
17
17
20
15
5
132
132
24
40
40
63
63
4
19
19
1
Energy Detect Power Down
AN General Power Down
Non-AN Gen Power Down
7
45
5
24
7
4
1
22
5
0.66
0.200
4
1
Notes:
1. Each LED indicator in use adds approximately 4 mA to the Digital power supply.
2. Digital Power pins on LAN83C185 are: VDD pins 8, 18, 43.
3. Analog Power pins on LAN83C185 are: AVDD pins 53, 57, 61, 63.
4. Regulator Supply pins on LAN83C185 are: VREG pin 13.
5. Traffic Utilization = 100%
6. Mode of Operation in both cases is full duplex.
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA5S5HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
6.5.2.2
Power Consumption Device and System Components
Power measurements taken under the following conditions:
Temperature:
Device VDD:
+25° C
+3.30 V
Table 6.2 Power Consumption Device and System Components
REGULATOR
SUPPLY CURRENT
DIGITAL POWER
ANALOG POWER
Total
Power
(mW)
Power
(mW)
Current
(mA)
Power
(mW)
Current
(mA)
Power
(mW)
Current
(mA)
Mode
10BASE-T Operation
10BASE-T /w traffic
Idle
476
463
45
33
20
17
17
17
10
6
439
439
24
133
133
7
4
4
4
4
4
1
1
1
1
1
Energy Detect Power Down
AN General Power Down
Non-AN Gen Power Down
5
45
5
24
7
22
5
.66
.200
100BASE-TX Operation
100BASE-TX /w traffic
Idle
400
384
45
66
50
17
17
17
20
15
5
271
271
24
82
82
7
63
63
4
19
19
1
Energy Detect Power Down
AN General Power Down
Non-AN Gen Power Down
45
5
24
7
4
1
22
5
.66
.200
4
1
Notes:
1. Each LED indicator in use adds approximately 4 mA to the Digital power supply.
2. Digital Power pins on LAN83C185 are: VDD pins 8, 18, 43.
3. Analog Power pins on LAN83C185 are: AVDD pins 53, 57, 61, 63.
4. Regulator Supply pins on LAN83C185 are: VREG pin 13.
5. Traffic Utilization = 100%
6. Mode of Operation in both cases is full duplex.
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA5S6HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
6.5.3
DC Characteristics - Input and Output Buffers
Table 6.3 MII BUS INTERFACE SIGNALS
PIN NO.
NAME
VIH
VIL
IOH
IOL
VOL
VOH
41
42
44
45
37
39
38
TXD0
TXD1
+2.0 V
+2.0 V
+2.0 V
+2.0 V
+2.0 V
+2.0 V
+0.8 V
+0.8 V
+0.8 V
+0.8 V
+0.8 V
+0.8 V
TXD2
TXD3
TX_ER/TXD4
TX_EN
TX_CLK
-8 mA
-8 mA
-8 mA
-8 mA
-8 mA
-8 mA
-8 mA
-8 mA
-8 mA
-8 mA
+8 mA
+8 mA
+8 mA
+8 mA
+8 mA
+8 mA
+8 mA
+8 mA
+8 mA
+8 mA
+0.4 V
+0.4 V
+0.4 V
+0.4 V
+0.4 V
+0.4 V
+0.4 V
+0.4 V
+0.4 V
+0.4 V
VDD –
+0.4 V
32
31
30
29
35
33
34
48
47
RXD0
RXD1
VDD –
+0.4 V
VDD –
+0.4 V
RXD2
VDD –
+0.4 V
RXD3
VDD –
+0.4 V
RX_ER/RXD4
RX_DV
RX_CLK
CRS
VDD –
+0.4 V
VDD –
+0.4 V
VDD –
+0.4 V
VDD –
+0.4 V
COL
VDD –
+0.4 V
27
26
MDC
+2.0 V
+0.8 V
MDIO
-8 mA
+8 mA
+0.4 V
VDD –
+0.4 V
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA5S7HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 6.4 LAN Interface Signals
PIN NO.
NAME
VIH
VIL
IOH
IOL
VOL
VOH
51
50
55
54
TXP
TXN
RXP
RXN
See Table 6.10, “100Base-TX Transceiver Characteristics,” on page 60 and
Table 6.11, “10BASE-T Transceiver Characteristics,” on page 60.
Table 6.5 LED Signals
PIN NO.
NAME
VIH
VIL
IOH
IOL
VOL
VOH
16
SPEED100
+2.0 V
+0.8 V
-12 mA
+24 mA
+0.4 V
VDD –
+0.4 V
17
19
20
LINKON
+2.0 V
+2.0 V
+2.0 V
+0.8 V
+0.8 V
+0.8 V
-12 mA
-12 mA
-12 mA
+24 mA
+24 mA
+24 mA
+0.4 V
+0.4 V
+0.4 V
VDD –
+0.4 V
ACTIVITY
FDUPLEX
VDD –
+0.4 V
VDD –
+0.4 V
Table 6.6 Configuration Inputs
PIN NO.
NAME
VIH
VIL
IOH
IOL
VOL
VOH
16
PHYAD0
+2.0 V
+0.8 V
-12 mA
+24 mA
+0.4 V
VDD –
+0.4 V
17
19
20
2
PHYAD1
PHYAD2
PHYAD3
PHYAD4
+2.0 V
+2.0 V
+2.0 V
+0.8 V
+0.8 V
+0.8 V
-12 mA
-12 mA
-12 mA
-4 mA
+24 mA
+24 mA
+24 mA
+8 mA
+0.4 V
+0.4 V
+0.4 V
+0.4 V
VDD –
+0.4 V
VDD –
+0.4 V
VDD –
+0.4 V
VDD –
+0.4 V
4
5
MODE0
MODE1
MODE2
TEST0
+2.0 V
+2.0 V
+2.0 V
+2.0 V
+2.0 V
+2.0 V
+0.8 V
+0.8 V
+0.8 V
+0.8 V
+0.8 V
+0.8 V
6
9
10
11
12
TEST1
CLK_FREQ
REG_EN
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA5S8HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 6.6 Configuration Inputs (continued)
PIN NO.
NAME
VIH
VIL
IOH
IOL
VOL
VOH
1
MII
-4 mA
+8 mA
+0.4 V
VDD –
+0.4 V
Table 6.7 General Signals
PIN NO.
NAME
VIH
VIL
IOH
IOL
VOL
VOH
1
GPO0
-4 mA
+8 mA
+0.4 V
VDD –
+0.4 V
2
3
GPO1
GPO2
nINT
-4 mA
-4 mA
-4 mA
+8 mA
+8 mA
+8 mA
+0.4 V
+0.4 V
+0.4 V
VDD –
+0.4 V
VDD –
+0.4 V
46
VDD –
+0.4 V
25
23
22
64
nRST
CLKIN/XTAL1
XTAL2
NC1
Table 6.8 Analog References
VIH VIL IOH
PIN NO.
NAME
IOL
VOL
VOH
59
56
EXRES1
NC2
Table 6.9 Internal Pull-Up / Pull-/Down Configurations
PIN NO.
NAME
PULL-UP OR PULL-DOWN
TYPE
1
2
GPO0/MII
GPO1/PHYAD4
MODE0
Pull-down
Pull-up
30 uA
30 uA
30 uA
30 uA
30 uA
30 uA
30 uA
30 uA
4
Pull-up
5
MODE1
Pull-up
6
MODE2
Pull-up
9
TEST0
Pull-down
Pull-down
Pull-up
10
16
TEST1
SPEED100
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA5S9HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 6.9 Internal Pull-Up / Pull-/Down Configurations (continued)
PIN NO.
NAME
PULL-UP OR PULL-DOWN
TYPE
17
19
20
46
LINKON
ACTIVITY
FDUPLEX
nINT
Pull-up
Pull-up
Pull-up
Pull-up
30 uA
30 uA
30 uA
30 uA
Table 6.10 100Base-TX Transceiver Characteristics
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Peak Differential Output Voltage High
Peak Differential Output Voltage Low
Signal Amplitude Symmetry
Signal Rise & Fall Time
Rise & Fall Time Symmetry
Duty Cycle Distortion
VPPH
VPPL
VSS
950
-950
98
3.0
-
-
-
1050
-1050
102
5.0
mVpk
mVpk
%
Note 6.1
Note 6.1
Note 6.1
Note 6.1
Note 6.1
Note 6.2
-
TRF
-
nS
TRFS
DCD
VOS
-
0.5
nS
35
-
50
-
65
%
Overshoot & Undershoot
Jitter
5
%
1.4
nS
Note 6.3
Note 6.1 Measured at the line side of the transformer, line replaced by 100Ω (+/- 1%) resistor.
Note 6.2 Offset from16 nS pulse width at 50% of pulse peak
Note 6.3 Measured differentially.
Table 6.11 10BASE-T Transceiver Characteristics
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Transmitter Peak Differential Output Voltage
Receiver Differential Squelch Threshold
VOUT
VDS
2.2
2.5
2.8
V
Note 6.4
300
420
585
mV
Note 6.4 Min/max voltages guaranteed as measured with 100Ω resistive load.
Rev. 0.8 (11-16-04)
SMSC LAN83C185
DATA6S0HEET
High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Chapter 7 Package Outline
Figure 7.1 64 Pin TQFP Package Outline, 10X10X1.4 Body, 2 MM Footprint
Table 7.1 64 Pin TQFP Package Parameters
MIN
NOMINAL
MAX
REMARKS
A
A1
A2
D
D1
E
E1
H
L
~
~
~
~
~
~
~
~
~
1.60
0.15
1.45
12.20
10.20
12.20
10.20
0.20
0.75
~
Overall Package Height
Standoff
0.05
1.35
11.80
9.80
11.80
9.80
0.09
0.45
~
Body Thickness
X Span
X body Size
Y Span
Y body Size
Lead Frame Thickness
Lead Foot Length
Lead Length
0.60
1.00
0.50 Basic
L1
e
Lead Pitch
Lead Foot Angle
Lead Width
θ
0o
0.17
0.08
0.08
~
~
0.22
~
~
~
7o
0.27
~
0.20
0.08
W
R
R2
ccc
Lead Shoulder Radius
Lead Foot Radius
Coplanarity
Notes:
1. Controlling Unit: millimeter.
2. Tolerance on the true position of the leads is ± 0.04 mm maximum.
3. Package body dimensions D1 and E1 do not include the mold protrusion.
Maximum mold protrusion is 0.25 mm per side.
4. Dimension for foot length L measured at the gauge plane 0.25 mm above the seating plane.
5. Details of pin 1 identifier are optional but must be located within the zone indicated.
SMSC LAN83C185
Rev. 0.8 (11-16-04)
DATA6S1HEET
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