BU9929FV [ROHM]
I2C BUS interface, general purpose I/O ports with condition watching function; I2C总线接口，通用I / O端口与条件看功能
| 型号： | BU9929FV |
| 厂家： | 
ROHM |
| 描述： | I2C BUS interface, general purpose I/O ports with condition watching function |
| 文件： | 总12页 (文件大小：155K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
BU9929FV
Multimedia ICs
I2C BUS interface, general purpose I/O
ports with condition watching function
BU9929FV
ROHM’s GPIO is a general-purpose IO that contains I2C BUS interface. It also contains monitoring function that conveys
a change of the signal level in terminal to the host system via interrupt terminal or I2C BUS.
!Applications
Notebook PC, PC, VCR, TV etc. and other systems with I2C BUS.
!Features
1) I2C BUS interface
2) General purpose I/O port 16bits
3) State monitoring function to monitor all terminals
4) State detection signal serial output by I2C BUS master function
5) Output port of state detection signal
6) State detection ON/OFF setting input port during the default status
7) 32.768kHz clock input
8) Power supply voltage 3.3V / 5.0V
!Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
Limits
7.0
Unit
V
Supply voltage
VDD
Power dissipation
Operating temperature
Storage temperature
Terminal supply voltage
Pd
640
mW
˚C
Topr
Tsig
−15 to +75
−55 to +125
GND−0.5 to VDD+0.5
˚C
VIN
V
∗Temperature derating : 6.4mW/˚C over Ta=25˚C
Radiation resistance is not included in the design.
Rohm CO., Ltd is a licensee of I2C BUS from Philips Semiconductors.
!Recommended operating conditions (Ta=25°C)
Parameter
Min.
Typ.
Max.
Unit
V
Operating supply voltage range
3.0
−
5.5
1/11
BU9929FV
Multimedia ICs
!Block diagram
#RES
CLK
DEFAULT STATUS
DS
TIMING
GENERATOR
TIMING
CONTROLLER
SDA
SCL
I2C BUS
INTERFACE
DATA LATCH
BLOCK
EDGE DETECT
BLOCK
INT
SLAVE ADDRESS 2 BITS
AD0
AD1
PIO BUFFER
SCL
1
2
28
27
VDD
SDT
DS
CLK
RESB
3
4
26
25
TEST0
PION0
PIO15
PIO14
5
6
7
8
9
24
PION1
PION2
23 PIO13
PIO12
PIO11
22
21
PION3
PION4
20 PIO10
19 PIO9
PION5 10
PION6
PIO8
11
12
13
14
18
17
16
15
INT
TEST1
AD1
PION7
GND
AD0
2/11
BU9929FV
Multimedia ICs
!Pin description
Pin. No
Pin. Name
I/O circuit
Pin Description
SCL
SDT
1
2
I2C BUS Input/Output terminal
To set condition detection mode
at default state
3
DS
Reset terminal
Reset condition by "L" input
26
RES#
PION
PIO
Nch open drain standard input/output
terminal. Input at TTL level.
This waits for condition detection function
of input.
Output will be Hi-Z at Shut Down mode.
5V input is possible when this IC is
operated by 3.3V.
5-11,13
18-25
14
Standard input/output terminal. Input at
TTL level.
This waits for condition detection function
of input. Output will be Hi-Z at Shut Down
mode.
GND
GND terminal
3/11
BU9929FV
Multimedia ICs
Pin. No
Pin. Name
I/O circuit
Pin Description
Output terminal for condition change
detection.
12
INT
Nch open drain output.
Clock input terminal.
32.768KHz should be put.
At Shut Down mode, clock supply into
this IC will be shut down.
27
CLK
Power terminal.
3.3V/5.0V should be put in.
28
VDD
Input terminal for setting of I2C BUS
Slave address lower 2 bits.
15
16
AD0
AD1
IC TEST Pin.
"L" Input required for normal operation.
4
TEST0
IC TEST Pin.
"L" Input required for normal operation.
17
TEST1
4/11
BU9929FV
Multimedia ICs
!Electrical characteristics (Unless otherwise noted, VDD=5.0V, Ta=25°C)
Min.
−
Typ.
6.0
Max.
30
Unit
µA
µA
V
Conditions
CLK=32.768Hz
Shut Down Mode
Test Pin No.
Parameter
Symbol
28
Circuit current (Normal)
Circuit current (Shut down mode)
"H" Level input voltage 1
"L" Level input voltage 1
"H" Level input voltage 2
I
DD
DS
IH1
IL1
IH2
28
I
−
0.1
2.0
1, 2
V
V
DD×0.7
VDD
V
V
V
DD+0.5
1, 2
V
−0.5
0.0
DD×0.3
V
3, 4, 15-17
V
2.5
V
DD
DD+0.5
0.8
V
3-5, 11, 13
15-27
"L" Level input voltage 2
"H" Level input voltage 3
"H" Level input Current
V
IL2
−0.5
2.5
0.0
V
V
5-11, 13
V
IH3
IH
V
DD
5.5
3-5, 11, 13
15-27
I
2.0
0.0
0.0
1.0
µA
3-5, 11, 13
15-27
"L" Level input Current
I
IL
−1.0
−
µA
18-25
"H" Level output voltage
"L" Level output voltage 1
"L" Level output voltage 2
V
SOH
4.4
0.0
0.0
4.8
0.2
0.2
5.0
0.6
0.6
V
V
V
I
I
I
I
OH=4mA
OL=4mA
OL=6mA
OL=6mA
5-13, 18-25
1, 2
V
SOL
COL
V
I2C Fall time
TFIC
−
100
250
ns
1, 2
CL=400pF
5/11
BU9929FV
Multimedia ICs
I2C BUS Interface characteristics (Unless otherwise noted, VDD=5.0V, Ta=25°C)
•Slave address
0
1
1
1
1
A1
A0
R / W
LSB
MSB
A0 and A1 are set by input terminals of AD0 and AD1 as follows;
When AD0 / AD1=H, A0 / A1=1
When AD0 / AD1=L, A0 / A1=0
•Conforming to I2C BUS standard
Parameter
SCL clock frequency
Start condition hold time
Start condition set-up time
Data set-up time
Symbol
f SCL
Min.
0
Max.
400
−
Unit
kHz
µs
t HD : STA
t SU : STA
t SU : DAT
t HD : DAT
t SU : STO
0.6
0.6
100
0
−
µs
−
ns
Data hold time
0.9
−
µs
Stop condition set-up time
0.6
µs
(Start Timing)
SCL
SDA
t SU : STA
t HD : STA
(Data Timing)
SCL
SDA
t SU : DAT
t HD : DAT
(Stop Timing)
SCL
SDA
t SU : STO
6/11
BU9929FV
Multimedia ICs
1. Data write mode
St SLAVE ADDRESS
A
COMMAND BYTE
A
WRITE DATA 1
A
WRITE DATA 2
A
Sp
W
PION7 − PION0
PIO15 − PIO8
Command register : At reset, D0 to D7 are ”0”.
D7
D6
D5
D4
D3
D2
D1
D0
SHT DWN INT SEL DOUT SEL OUT ON
DIR ON BYTE SEL EDGE SEL DET ON
D7 : Shut Down mode
0 : Shut down mode off (Normal operation mode)
1 : Shut down mode on
D6 : INT output method choice
0 : LOW output
1 : Output of LOW pulse equivalent for one period of CLK
D5 : Detection result output choice
0 : Serial output. INT pin is also valid.
1 : Serial output (I2C MASTER function) off. Only INT pin is valid.
D4 : Output port writing set
0 : Writing invalid
1 : Writing valid. But, a port, which is indicated as input, is invalid.
Following Write data 2byte-0 : “L” output, 1 : “H” output
D3 : I / O direction set
0 : Direction set invalid
1 : Direction set valid
Following Write data 2byte-0 : input, 1 : output
D2 : Watching object input choice
0 : PION0 to PION7
1 : PION8 to PIO15
D1 : Change detection mode
0 : Falling edge
1 : Both rising and falling edge
D0 : Input port condition watching mode
0 : Invalid
1 : Valid
7/11
BU9929FV
Multimedia ICs
2. Data read mode
According to the following format, input/output value of PIO/PION pins can be read by I2C interface.
PIO data read
St SLAVE ADDRESS
R
A
READ DATA 1
A
READ DATA 2
A
Sp
PION7 − PION0
PIO15 − PIO8
PIO part block diagram
I2C BUS
(PIO part block diagram)
Output Buffer
Command D4
Output Register
Command D3
I / O select
Selector
IC
PAD
Shut Down
Read Mode
Input Register
Input Schmitt
Input Port sampling timing
As shown below, BU9929FV is sampling for Input Ports with the rising edges of CLK.
Therefore it is necessary that Input Ports are keeping at least 1 CLK cycle, for their certain inputs.
Watching Ports
F6
C7
AA
CLK
8/11
BU9929FV
Multimedia ICs
3.Condition change detection result output mode
1) This IC becomes I2C master device, and the detection result is sent according to the following format;
2Byte Watching
St 0 0 0 1 0 0 0
W
A
SLAVE ADDRESS +0
A
WRITE DATA 1
A
WRITE DATA 2
A
Sp
PION7 − PION0
PIO15 − PIO8
1Byte Watching
St 0 0 0 1 0 0 0
W
A
SLAVE ADDRESS +0
A
WRITE DATA 1
A
Sp
PION7 − PION0
<DATA Keeping Operation>
In a case that there is a change in detection port during detection result transmission, then watching data is saved by the
end of detection output, and it will be proceeded further after the detection output is finished.
However, the output data in this case will be “AND” output of every bits of the watching data.
Watching Ports
FE
FC
F0
F8
In the case of Arbitration;
Output is delayed
AND Output of every bits of
the watching data
Output for I2C BUS
FE
FC
F0
2) DS pin Description
By DS pin, valid/invalid of condition detection of the default condition (from RESET release to reception of the first I2C
command) can be set.
<DS pic valid range>
In the range from RESET release to the first set of condition detection mode by I2C command, the set of this pin will be
valid. After the set of condition detection mode by I2C command, this pin will be invalid, and the set by I2C commanded
will be reflected.
<Pin setting>
DS pin= “H” : Input bit condition detection mode is valid.
But, 1 byte detection mode (only PION7-PION0 will be in condition detection)
DS pin=“L” : Input bit condition detection mode is invalid.
9/11
BU9929FV
Multimedia ICs
3）INT pin specification
When condition watching mode, INT output pin works for reporting of detection of watching port.
(a) When command D6=0(including default time after RESET release)
INT pin falls when detection of watching port is received. And INT pin rises after ACK-output which is on the I2C Data
read.
Watching Ports
F8
CLK
Output for I2C BUS
St
SLAVE ADDRESS
A
OUTPUT "F8"
INT OUTPUT
In the case that there is a change in detection ports once, and there are another changes before returning the ACK (as
shown “A term”), then watching data is saved. And the output data in this case will be “AND” output of every bits of the
watching data.
Watching Ports
F6
C7
A4
" A term"
Output for I2C BUS
St
SLAVE ADDRESS
R
A
OUTPUT "84"
OUTPUT "84hex data" which
is the result of AND data
for "F6", "C7" and " A4".
CLK
INT OUTPUT
10/11
BU9929FV
Multimedia ICs
(b) When command D6=1
INT pin outputs ”I clock cycle pulse” when detection of watching port is received. In the case that the output data is the
data whish is sampled immediately before the returning ACK.
Watching Ports
78
AA
Output for I2C BUS
St
SLAVE ADDRESS
R
A
OUTPUT "AA"
Data "78h" is not kept, the
output data is immediately
before sampled data.
CLK
INT OUTPUT
CLK 1 cycle pulse
4. Shut down mode
By command D7=1, this IC can be set to Shut down mode, which can save current consumption. At Shut down mode,
operation of CLK input pin will be stopped, and input of CLK into this IC can be shut down. Also, for every PIO/PION pins,
pins under output condition will be saved as Hi-Z.
At Shut down mode, condition-watching function can not be used.
Contents of each register before shut down will be saved by the shut down release.
!External dimensions (Unit : mm)
10.0±0.2
28
15
1
14
0.65
0.22±0.1
0.3Min.
0.1
SSOP-B28
11/11
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
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