AM29F032B-90SE [AMD]
32 Megabit (4 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory; 32兆位( 4米×8位) CMOS 5.0伏只,统一部门快闪记忆体型号: | AM29F032B-90SE |
厂家: | AMD |
描述: | 32 Megabit (4 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory |
文件: | 总39页 (文件大小:864K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Am29F032B
Data Sheet
-XO\ꢀꢁꢂꢂꢃ
7KHꢀIROORZLQJꢀGRFXPHQWꢀVSHFLILHVꢀ6SDQVLRQꢀPHPRU\ꢀSURGXFWVꢀWKDWꢀDUHꢀQRZꢀRIIHUHGꢀE\ꢀERWKꢀ$GYDQFHG
0LFURꢀ'HYLFHVꢀDQGꢀ)XMLWVXꢄꢀ$OWKRXJKꢀWKHꢀGRFXPHQWꢀLVꢀPDUNHGꢀZLWKꢀWKHꢀQDPHꢀRIꢀWKHꢀFRPSDQ\ꢀWKDWꢀRULJꢅ
LQDOO\ꢀGHYHORSHGꢀWKHꢀVSHFLILFDWLRQꢆꢀWKHVHꢀSURGXFWVꢀZLOOꢀEHꢀRIIHUHGꢀWRꢀFXVWRPHUVꢀRIꢀERWKꢀ$0'ꢀDQG
)XMLWVXꢄ
Continuity of Specifications
7KHUHꢀLVꢀQRꢀFKDQJHꢀWRꢀWKLVꢀGDWDVKHHWꢀDVꢀDꢀUHVXOWꢀRIꢀRIIHULQJꢀWKHꢀGHYLFHꢀDVꢀDꢀ6SDQVLRQꢀSURGXFWꢄꢀꢀ$Q\
FKDQJHVꢀWKDWꢀKDYHꢀEHHQꢀPDGHꢀDUHꢀWKHꢀUHVXOWꢀRIꢀQRUPDOꢀGDWDVKHHWꢀLPSURYHPHQWꢀDQGꢀDUHꢀQRWHGꢀLQꢀWKH
GRFXPHQWꢀUHYLVLRQꢀVXPPDU\ꢆꢀZKHUHꢀVXSSRUWHGꢄꢀꢀ)XWXUHꢀURXWLQHꢀUHYLVLRQVꢀZLOOꢀRFFXUꢀZKHQꢀDSSURSULDWHꢆ
DQGꢀFKDQJHVꢀZLOOꢀEHꢀQRWHGꢀLQꢀDꢀUHYLVLRQꢀVXPPDU\ꢄ
Continuity of Ordering Part Numbers
$0'ꢀDQGꢀ)XMLWVXꢀFRQWLQXHꢀWRꢀVXSSRUWꢀH[LVWLQJꢀSDUWꢀQXPEHUVꢀEHJLQQLQJꢀZLWKꢀ³$P´ꢀDQGꢀ³0%0´ꢄꢀ7RꢀRUGHU
WKHVHꢀSURGXFWVꢆꢀSOHDVHꢀXVHꢀRQO\ꢀWKHꢀ2UGHULQJꢀ3DUWꢀ1XPEHUVꢀOLVWHGꢀLQꢀWKLVꢀGRFXPHQWꢄ
For More Information
3OHDVHꢀFRQWDFWꢀ\RXUꢀORFDOꢀ$0'ꢀRUꢀ)XMLWVXꢀVDOHVꢀRIILFHꢀIRUꢀDGGLWLRQDOꢀLQIRUPDWLRQꢀDERXWꢀ6SDQVLRQ
PHPRU\ꢀVROXWLRQVꢄ
Publication Number 21610 Revision D Amendment +1 Issue Date December 5, 2000
Am29F032B
32 Megabit (4 M x 8-Bit)
CMOS 5.0 Volt-only, Uniform Sector Flash Memory
DISTINCTIVE CHARACTERISTICS
■ 5.0 V ± 10%, single power supply operation
■ Minimum 1,000,000 write/erase cycles
guaranteed
— Minimizes system level power requirements
■ 20-year data retention at 125°C
— Reliable operation for the life of the system
■ Package options
■ Manufactured on 0.32 µm process technology
■ High performance
— Access times as fast as 70 ns
— 40-pin TSOP
■ Low power consumption
— 44-pin SO
— 30 mA typical active read current
— 30 mA typical program/erase current
■ Compatible with JEDEC standards
— Pinout and software compatible with
single-power-supply Flash standard
— <1 µA typical standby current (standard access
time to active mode)
— Superior inadvertent write protection
■ Flexible sector architecture
— 64 uniform sectors of 64 Kbytes each
— Any combination of sectors can be erased.
— Supports full chip erase
■ Data# Polling and toggle bits
— Provides a software method of detecting program
or erase cycle completion
■ Ready/Busy output (RY/BY#)
— Group sector protection:
— Provides a hardware method for detecting
program or erase cycle completion
— A hardware method of locking sector groups to
prevent any program or erase operations within
that sector group
■ Erase Suspend/Resume
— Suspends a sector erase operation to read data
from, or program data to, a non-erasing sector,
then resumes the erase operation
— Temporary Sector Group Unprotect allows code
changes in previously locked sectors
■ Embedded Algorithms
■ Hardware reset pin (RESET#)
— Embedded Erase algorithm automatically
preprograms and erases the entire chip or any
combination of designated sectors
— Resets internal state machine to the read mode
— Embedded Program algorithm automatically
writes and verifies bytes at specified addresses
This Data Sheet states AMD’s current technical specifications regarding the Product described herein. This Data
Sheet may be revised by subsequent versions or modifications due to changes in technical specifications.
Publication# 21610 Rev: D Amendment/+1
Issue Date: December 5, 2000
GENERAL DESCRIPTION
The Am29F032B is a 32 Mbit, 5.0 volt-only Flash
memory organized as 4,194,304 bytes of 8 bits each.
The 4 Mbytes of data are divided into 64 sectors of 64
Kbytes each for flexible erase capability. The 8 bits of
data appear on DQ0–DQ7. The Am29F032B is offered
in 40-pin TSOP and 44-pin SO packages. The
Am29F032B is manufactured using AMD’s 0.32 µm
process technology. This device is designed to be pro-
grammed in-system with the standard system 5.0 volt
VCC supply. A 12.0 volt VPP is not required for program
or erase operations. The device can also be pro-
grammed in standard EPROM programmers.
The sector erase architecture allows memory sectors
to be erased and reprogrammed without affecting the
data contents of other sectors. A sector is typically
erased and verified within one second. The device is
erased when shipped from the factory.
The hardware sector group protection feature disables
both program and erase operations in any combination
of the eight sector groups of memory. A sector group
consists of four adjacent sectors.
The Erase Suspend feature enables the system to put
erase on hold for any period of time to read data from,
or program data to, a sector that is not being erased.
True background erase can thus be achieved.
The standard device offers access times of 70, 90,
120, and 150 ns, allowing high-speed microprocessors
to operate without wait states. To eliminate bus con-
tention, the device has separate chip enable (CE#),
write enable (WE#), and output enable (OE#) controls.
The device requires only a single 5.0 volt power supply
for both read and write functions. Internally generated
and regulated voltages are provided for the program
and erase operations. A low VCC detector automati-
cally inhibits write operations during power transitions.
The host system can detect whether a program or
erase cycle is complete by using the RY/BY# pin, the
DQ7 (Data# Polling) or DQ6 (toggle) status bits. After
a program or erase cycle has been completed, the de-
vice automatically returns to the read mode.
The device is entirely command set compatible with
the JEDEC single-power-supply Flash standard. Com-
mands are written to the command register using stan-
dard microprocessor write timings. Register contents
serve as input to an internal state machine that con-
trols the erase and programming circuitry. Write cycles
also internally latch addresses and data needed for
the programming and erase operations. Reading data
out of the device is similar to reading from 12.0 volt
Flash or EPROM devices.
A hardware RESET# pin terminates any operation in
progress. The internal state machine is reset to the
read mode. The RESET# pin may be tied to the sys-
tem reset circuitry. Therefore, if a system reset occurs
during either an Embedded Program or Embedded
Erase algorithm, the device is automatically reset to the
read mode. This enables the system’s microprocessor
to read the boot-up firmware from the Flash memory.
The device is programmed by executing the program
command sequence. This invokes the Embedded Pro-
gram algorithm—an internal algorithm that automati-
cally times the program pulse widths and verifies
proper cell margin. The device is erased by executing
the erase command sequence. This invokes the Em-
bedded Erase algorithm—an internal algorithm that
automatically preprograms the array (if it is not already
programmed) before executing the erase operation.
During erase, the device automatically times the erase
pulse widths and verifies proper cell margin.
AMD’s Flash technology combines years of Flash
memory manufacturing experience to produce the
highest levels of quality, reliability, and cost
effectiveness. The device electrically erases all bits
within a sector simultaneously via Fowler-Nordheim
tunneling. The bytes are programmed one byte at
a time using the programming mechanism of hot
electron injection.
2
Am29F032B
TABLE OF CONTENTS
Product Selector Guide . . . . . . . . . . . . . . . . . . . . . 4
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . 5
Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Logic Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ordering Information. . . . . . . . . . . . . . . . . . . . . . . 7
Device Bus Operations . . . . . . . . . . . . . . . . . . . . . 8
Table 1. Am29F032B Device Bus Operations .................................. 8
Requirements for Reading Array Data ..................................... 8
Writing Commands/Command Sequences .............................. 8
Program and Erase Operation Status ...................................... 9
Standby Mode .......................................................................... 9
RESET#: Hardware Reset Pin ................................................. 9
Output Disable Mode................................................................ 9
Table 2. Am29F032B Sector Address Table................................... 10
Autoselect Mode..................................................................... 11
Table 3. Am29F032B Autoselect Codes......................................... 11
Sector Group Protection/Unprotection.................................... 12
Table 4. Sector Group Addresses................................................... 12
Temporary Sector Group Unprotect ....................................... 12
Figure 1. Temporary Sector Group Unprotect Operation................ 12
Hardware Data Protection ...................................................... 13
Low VCC Write Inhibit..................................................................... 13
Write Pulse “Glitch” Protection........................................................ 13
Logical Inhibit .................................................................................. 13
Power-Up Write Inhibit .................................................................... 13
Command Definitions . . . . . . . . . . . . . . . . . . . . . 13
Reading Array Data................................................................ 13
Reset Command..................................................................... 13
Autoselect Command Sequence............................................ 14
Byte Program Command Sequence....................................... 14
Chip Erase Command Sequence........................................... 14
Figure 2. Program Operation .......................................................... 15
Sector Erase Command Sequence........................................ 15
Erase Suspend/Erase Resume Commands........................... 15
Figure 3. Erase Operation............................................................... 16
Command Definitions ............................................................. 17
Table 5. Am29F032B Command Definitions................................... 17
Write Operation Status . . . . . . . . . . . . . . . . . . . . 18
DQ7: Data# Polling................................................................. 18
Figure 4. Data# Polling Algorithm ................................................... 18
RY/BY#: Ready/Busy# ........................................................... 19
DQ6: Toggle Bit I.................................................................... 19
DQ2: Toggle Bit II................................................................... 19
Reading Toggle Bits DQ6/DQ2 .............................................. 19
DQ5: Exceeded Timing Limits................................................ 20
DQ3: Sector Erase Timer ....................................................... 20
Figure 5. Toggle Bit Algorithm........................................................ 20
Table 6. Write Operation Status..................................................... 21
Absolute Maximum Ratings. . . . . . . . . . . . . . . . . 22
Figure 6. Maximum Negative Overshoot Waveform ...................... 22
Figure 7. Maximum Positive Overshoot Waveform........................ 22
Operating Ranges. . . . . . . . . . . . . . . . . . . . . . . . . 22
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 23
TTL/NMOS Compatible .......................................................... 23
CMOS Compatible.................................................................. 23
Test Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 8. Test Setup...................................................................... 24
Table 7. Test Specifications........................................................... 24
Key To Switching Waveforms . . . . . . . . . . . . . . . 24
AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 25
Read-only Operations............................................................. 25
Figure 9. Read Operation Timings................................................. 25
Hardware Reset (RESET#) .................................................... 26
Figure 10. RESET# Timings .......................................................... 26
Write (Erase/Program) Operations ......................................... 27
Figure 11. Program Operation Timings.......................................... 28
Figure 12. Chip/Sector Erase Operation Timings .......................... 29
Figure 13. Data# Polling Timings (During Embedded Algorithms). 30
Figure 14. Toggle Bit Timings (During Embedded Algorithms)...... 30
Figure 15. DQ2 vs. DQ6................................................................. 31
Temporary Sector Unprotect .................................................. 31
Figure 16. Temporary Sector Group Unprotect Timings................ 31
Write (Erase/Program) Operations—Alternate CE#
Controlled Writes .................................................................... 32
Figure 17. Alternate CE# Controlled Write Operation Timings ...... 33
Erase And Programming Performance . . . . . . . 34
Latchup Characteristic . . . . . . . . . . . . . . . . . . . . 34
TSOP And SO Pin Capacitance . . . . . . . . . . . . . 34
Data Retention. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . 35
SO 044–44-Pin Small Outline Package.................................. 35
TS 040–40-Pin Standard Thin Small Outline Package........... 36
TSR040–40-Pin Reversed Thin Small Outline Package ........ 37
Revision Summary . . . . . . . . . . . . . . . . . . . . . . . . 38
Revision A (June 1998) .......................................................... 38
Revision B (July 1998)............................................................ 38
Revision C (January 1999) ..................................................... 38
Revision C+1 (April 14, 1999)................................................. 38
Revision D (November 17, 1999) ........................................... 38
Revision D+1 (December 5, 2000) ......................................... 38
Am29F032B
3
PRODUCT SELECTOR GUIDE
Family Part Number
Am29F032B
VCC = 5.0 V ± 5%
-75
Speed Options
VCC = 5.0 V ± 10%
-90
90
90
40
-120
-150
150
150
75
Max access time, ns (tACC
)
70
70
40
120
120
50
Max CE# access time, ns (tCE
)
)
Max OE# access time, ns (tOE
Note: See “AC Characteristics” for full specifications.
BLOCK DIAGRAM
DQ0–DQ7
Sector Switches
VCC
VSS
Erase Voltage
Generator
Input/Output
Buffers
RY/BY#
RESET#
State
Control
WE#
Command
Register
PGM Voltage
Generator
Data
Latch
Chip Enable
Output Enable
STB
CE#
OE#
Y-Decoder
X-Decoder
Y-Gating
STB
VCC Detector
Timer
Cell Matrix
A0–A21
4
Am29F032B
CONNECTION DIAGRAMS
A19
A18
A17
A16
A15
A14
A13
A12
CE#
VCC
NC
1
2
3
4
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
A20
A21
WE#
OE#
RY/BY#
DQ7
DQ6
DQ5
DQ4
VCC
VSS
VSS
DQ3
DQ2
DQ1
DQ0
A0
5
6
7
8
9
40-Pin Standard TSOP
10
11
12
13
14
15
16
17
18
19
20
RESET#
A11
A10
A9
A8
A7
A6
A5
A4
A1
A2
A3
A20
A21
1
2
3
4
40
A19
A18
A17
A16
A15
A14
A13
A12
CE#
VCC
NC
RESET#
A11
A10
A9
A8
A7
A6
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
WE#
OE#
RY/BY#
DQ7
DQ6
DQ5
DQ4
VCC
5
6
7
8
9
40-Pin Reverse TSOP
10
11
12
13
14
15
16
17
18
19
20
VSS
VSS
DQ3
DQ2
DQ1
DQ0
A0
A1
A2
A3
A5
A4
NC
RESET#
A11
A10
A9
1
2
3
4
5
6
7
8
9
44 VCC
43 CE#
42 A12
41 A13
40 A14
39 A15
38 A16
37 A17
36 A18
35 A19
34 NC
A8
A7
A6
A5
A4 10
NC 11
NC 12
A3 13
SO
33 NC
32 A20
31 A21
30 WE#
29 OE#
28 RY/BY#
27 DQ7
26 DQ6
25 DQ5
24 DQ4
23 VCC
A2 14
A1 15
A0 16
DQ0 17
DQ1 18
DQ2 19
DQ3 20
VSS 21
VSS 22
Am29F032B
5
PIN CONFIGURATION
LOGIC SYMBOL
A0–A21
=
22 Addresses
22
DQ0–DQ7 = 8 Data Inputs/Outputs
A0–A21
8
CE#
=
=
=
=
=
=
Chip Enable
DQ0–DQ7
WE#
Write Enable
OE#
Output Enable
CE#
OE#
RESET#
RY/BY#
VCC
Hardware Reset Pin, Active Low
Ready/Busy Output
WE#
+5.0 V single power supply
(see Product Selector Guide for
device speed ratings and voltage
supply tolerances)
RESET#
RY/BY#
VSS
NC
=
=
Device Ground
Pin Not Connected Internally
6
Am29F032B
ORDERING INFORMATION
Standard Products
AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is
formed by a combination of the following:
Am29F032B
-75
E
I
TEMPERATURE RANGE
C
I
=
=
=
Commercial (0°C to +70°C)
Industrial (–40°C to +85°C)
Extended (–55°C to +125°C)
E
PACKAGE TYPE
E
F
S
=
=
=
40-Pin Thin Small Outline Package (TSOP) Standard Pinout (TS 040)
40-Pin Thin Small Outline Package (TSOP) Reverse Pinout (TSR040)
44-Pin Small Outline Package (SO 044)
SPEED OPTION
See Product Selector Guide and Valid Combinations
DEVICE NUMBER/DESCRIPTION
Am29F032B
32 Megabit (4 M x 8-Bit) CMOS 5.0 Volt-only Sector Erase Flash Memory
5.0 V Read, Program, and Erase
Valid Combinations
Valid Combinations
Valid Combinations list configurations planned to be support-
ed in volume for this device. Consult the local AMD sales of-
fice to confirm availability of specific valid combinations and
to check on newly released combinations.
AM29F032B-75
AM29F032B-90
AM29F032B-120
AM29F032B-150
EC, EI, FC, FI, SC, SI
EC, EI, EE, FC, FI, FE,
SC, SI, SE
Am29F032B
7
DEVICE BUS OPERATIONS
This section describes the requirements and use of the
device bus operations, which are initiated through the
internal command register. The command register it-
self does not occupy any addressable memory loca-
tion. The register is composed of latches that store the
commands, along with the address and data informa-
tion needed to execute the command. The contents of
the register serve as inputs to the internal state ma-
chine. The state machine outputs dictate the function of
the device. The appropriate device bus operations
table lists the inputs and control levels required, and the
resulting output. The following subsections describe
each of these operations in further detail.
Table 1. Am29F032B Device Bus Operations
Operation
CE#
OE#
L
WE#
H
RESET#
A0–A21
DQ0–DQ7
DOUT
Read
Write
L
H
AIN
AIN
X
L
H
L
H
DIN
CMOS Standby
TTL Standby
VCC ± 0.5 V
X
X
VCC ± 0.5 V
High-Z
High-Z
High-Z
High-Z
H
L
X
X
H
H
L
X
Output Disable
Hardware Reset
H
H
X
X
X
X
X
Temporary Sector Unprotect
(See Note)
X
X
X
VID
AIN
DIN
Legend:
L = Logic Low = VIL, H = Logic High = VIH, VID = 12.0 ± 0.5 V, X = Don’t Care, DIN = Data In, DOUT = Data Out, AIN = Address In
Note: See the sections Sector Group Protection and Temporary Sector Unprotect for more information.
sectors of memory), the system must drive WE# and
CE# to VIL, and OE# to VIH.
Requirements for Reading Array Data
To read array data from the outputs, the system must
drive the CE# and OE# pins to VIL. CE# is the power
control and selects the device. OE# is the output con-
trol and gates array data to the output pins. WE#
should remain at VIH.
An erase operation can erase one sector, multiple sec-
tors, or the entire device. The Sector Address Tables
indicate the address space that each sector occupies.
A “sector address” consists of the address bits re-
quired to uniquely select a sector. See the “Writing
specific address and data commands or sequences
into the command register initiates device operations.
The Command Definitions table defines the valid reg-
ister command sequences. Writing incorrect address
and data values or writing them in the improper se-
quence resets the device to reading array data.” sec-
tion for details on erasing a sector or the entire chip, or
suspending/resuming the erase operation.
The internal state machine is set for reading array data
upon device power-up, or after a hardware reset. This
ensures that no spurious alteration of the memory
content occurs during the power transition. No com-
mand is necessary in this mode to obtain array data.
Standard microprocessor read cycles that assert valid
addresses on the device address inputs produce valid
data on the device data outputs. The device remains
enabled for read access until the command register
contents are altered.
After the system writes the autoselect command se-
quence, the device enters the autoselect mode. The
system can then read autoselect codes from the inter-
nal register (which is separate from the memory array)
on DQ7–DQ0. Standard read cycle timings apply in
this mode. Refer to the “Autoselect Mode” and “Au-
toselect Command Sequence” sections for more infor-
mation.
See “Reading Array Data” for more information. Refer
to the AC Read Operations table for timing specifica-
tions and to the Read Operations Timings diagram for
the timing waveforms. ICC1 in the DC Characteristics
table represents the active current specification for
reading array data.
Writing Commands/Command Sequences
ICC2 in the DC Characteristics table represents the ac-
tive current specification for the write mode. The “AC
To write a command or command sequence (which in-
cludes programming data to the device and erasing
8
Am29F032B
Characteristics” section contains timing specification
tables and timing diagrams for write operations.
drives the RESET# pin low for at least a period of tRP,
the device immediately terminates any operation in
progress, tristates all data output pins, and ignores all
read/write attempts for the duration of the RESET#
pulse. The device also resets the internal state ma-
chine to reading array data. The operation that was in-
terrupted should be reinitiated once the device is ready
to accept another command sequence, to ensure data
integrity.
Program and Erase Operation Status
During an erase or program operation, the system may
check the status of the operation by reading the status
bits on DQ7–DQ0. Standard read cycle timings and ICC
read specifications apply. Refer to “The Erase Resume
command is valid only during the Erase Suspend
mode.” for more information, and to each AC Charac-
teristics section for timing diagrams.
Current is reduced for the duration of the RESET#
pulse. When RESET# is held at VIL, the device enters
the TTL standby mode; if RESET# is held at VSS
0.5 V, the device enters the CMOS standby mode.
±
Standby Mode
When the system is not reading or writing to the device,
it can place the device in the standby mode. In this
mode, current consumption is greatly reduced, and the
outputs are placed in the high impedance state, inde-
pendent of the OE# input.
The RESET# pin may be tied to the system reset cir-
cuitry. A system reset would thus also reset the Flash
memory, enabling the system to read the boot-up firm-
ware from the Flash memory.
If RESET# is asserted during a program or erase oper-
ation, the RY/BY# pin remains a “0” (busy) until the in-
ternal reset operation is complete, which requires a
time of tREADY (during Embedded Algorithms). The sys-
tem can thus monitor RY/BY# to determine whether the
reset operation is complete. If RESET# is asserted
when a program or erase operation is not executing
(RY/BY# pin is “1”), the reset operation is completed
within a time of tREADY (not during Embedded Algo-
rithms). The system can read data tRH after the RE-
SET# pin returns to VIH.
The device enters the CMOS standby mode when CE#
and RESET# pins are both held at VCC ± 0.5 V. (Note
that this is a more restricted voltage range than VIH.)
The device enters the TTL standby mode when CE#
and RESET# pins are both held at VIH. The device re-
quires standard access time (tCE) for read access when
the device is in either of these standby modes, before it
is ready to read data.
The device also enters the standby mode when the RE-
SET# pin is driven low. Refer to the next section, “RE-
SET#: Hardware Reset Pin”.
Refer to the AC Characteristics tables for RESET# pa-
rameters and timing diagram.
If the device is deselected during erasure or program-
ming, the device draws active current until the
operation is completed.
Output Disable Mode
When the OE# input is at VIH, output from the device is
disabled. The output pins are placed in the high imped-
ance state.
In the DC Characteristics tables, ICC3 represents the
standby current specification.
RESET#: Hardware Reset Pin
The RESET# pin provides a hardware method of reset-
ting the device to reading array data. When the system
Am29F032B
9
Table 2. Am29F032B Sector Address Table
Sector
SA0
A21
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
A20
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
A19
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
A18
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
A17
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
A16
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Sector Size
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
Address Range
000000h–00FFFFh
010000h–01FFFFh
020000h–02FFFFh
030000h–03FFFFh
040000h–04FFFFh
050000h–05FFFFh
060000h–06FFFFh
070000h–07FFFFh
080000h–08FFFFh
090000h–09FFFFh
0A0000h–0AFFFFh
0B0000h–0BFFFFh
0C0000h–0CFFFFh
0D0000h–0DFFFFh
0E0000h–0EFFFFh
0F0000h–0FFFFFh
100000h–10FFFFh
110000h–11FFFFh
120000h–12FFFFh
130000h–13FFFFh
140000h–14FFFFh
150000h–15FFFFh
160000h–16FFFFh
170000h–17FFFFh
180000h–18FFFFh
190000h–19FFFFh
1A0000h–1AFFFFh
1B0000h–1BFFFFh
1C0000h–1CFFFFh
1D0000h–1DFFFFh
1E0000h–1EFFFFh
1F0000h–1FFFFFh
200000h–20FFFFh
210000h–21FFFFh
220000h–22FFFFh
230000h–23FFFFh
240000h–24FFFFh
250000h–25FFFFh
260000h–26FFFFh
270000h–27FFFFh
280000h–28FFFFh
290000h–29FFFFh
2A0000h–2AFFFFh
2B0000h–2BFFFFh
SA1
SA2
SA3
SA4
SA5
SA6
SA7
SA8
SA9
SA10
SA11
SA12
SA13
SA14
SA15
SA16
SA17
SA18
SA19
SA20
SA21
SA22
SA23
SA24
SA25
SA26
SA27
SA28
SA29
SA30
SA31
SA32
SA33
SA34
SA35
SA36
SA37
SA38
SA39
SA40
SA41
SA42
SA43
10
Am29F032B
Table 2. Am29F032B Sector Address Table (Continued)
Sector
SA44
SA45
SA46
SA47
SA48
SA49
SA50
SA51
SA52
SA53
SA54
SA55
SA56
SA57
SA58
SA59
SA60
SA61
SA62
SA63
A21
1
A20
0
A19
1
A18
1
A17
0
A16
0
Sector Size
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
64K
Address Range
2C0000h–2CFFFFh
2D0000h–2DFFFFh
2E0000h–2EFFFFh
2F0000h–2FFFFFh
300000h–30FFFFh
310000h–31FFFFh
320000h–32FFFFh
330000h–33FFFFh
340000h–34FFFFh
350000h–35FFFFh
360000h–36FFFFh
370000h–37FFFFh
380000h–38FFFFh
390000h–39FFFFh
3A0000h–3AFFFFh
3B0000h–3BFFFFh
3C0000h–3CFFFFh
3D0000h–3DFFFFh
3E0000h–3EFFFFh
3F0000h–3FFFFFh
1
0
1
1
0
1
1
0
1
1
1
0
1
0
1
1
1
1
1
1
0
0
0
0
1
1
0
0
0
1
1
1
0
0
1
0
1
1
0
0
1
1
1
1
0
1
0
0
1
1
0
1
0
1
1
1
0
1
1
0
1
1
0
1
1
1
1
1
1
0
0
0
1
1
1
0
0
1
1
1
1
0
1
0
1
1
1
0
1
1
1
1
1
1
0
0
1
1
1
1
0
1
1
1
1
1
1
0
1
1
1
1
1
1
Note: All sectors are 64 Kbytes in size.
tection, the sector group address must appear on the
appropriate highest order address bits (see Table 4).
Table 3 also shows the remaining address bits that are
don’t care. When all necessary bits have been set as
required, the programming equipment may then read
the corresponding identifier code on DQ7-DQ0.
Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector group protection verifica-
tion, through identifier codes output on DQ7–DQ0.
This mode is primarily intended for programming
equipment to automatically match a device to be pro-
grammed with its corresponding programming algo-
rithm. However, the autoselect codes can also be
accessed in-system through the command register.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in Table 5. This method
does not require VID on an address line. Refer to the
Autoselect Command Sequence section for more in-
formation.
When using programming equipment, the autoselect
mode requires VID (11.5 V to 12.5 V) on address pin
A9. Address pins A6, A1, and A0 must be as shown in
Table 3. In addition, when verifying sector group pro-
Table 3. Am29F032B Autoselect Codes
Identifier Code on
DQ7-DQ0
Description
A21-A18 A17-A10
A9 A8-A7 A6 A5-A2 A1
A0
VIL
VIH
Manufacturer ID: AMD
Device ID: Am29F032B
X
X
X
X
VID
VID
X
X
VIL
VIL
X
X
VIL
VIL
01h
41h
Sector
Group
Address
01h (protected)
Sector Group Protection
Verification
X
VID
X
VIL
X
VIH
VIL
00h (unprotected)
Note: Identifier codes for manufacturer and device IDs exhibit odd parity with DQ7 defined as the parity bit.
Am29F032B
11
Sector Group Protection/Unprotection
Temporary Sector Group Unprotect
The hardware sector group protection feature disables
both program and erase operations in any sector
group. Each sector group consists of four adjacent
sectors. Table 4 shows how the sectors are grouped,
and the address range that each sector group con-
tains. The hardware sector group unprotection feature
re-enables both program and erase operations in pre-
viously protected sector groups.
This feature allows temporary unprotection of previ-
ously protected sector groups to change data in-sys-
tem. The Sector Group Unprotect mode is activated by
setting the RESET# pin to VID (11.5 V – 12.5 V). Dur-
ing this mode, formerly protected sector groups can be
programmed or erased by selecting the sector group
addresses. Once VID is removed from the RESET#
pin, all the previously protected sector groups are
protected again. Figure 1 shows the algorithm, and
Figure 16 shows the timing diagrams, for this feature.
Sector group protection/unprotection must be imple-
mented using programming equipment. The proce-
dure requires a high voltage (VID) on address pin A9
and the control pins. Details on this method are pro-
vided in a supplement, publication number 22184.
Contact an AMD representative to obtain a copy of the
appropriate document.
START
RESET# = VID
(Note 1)
The device is shipped with all sector groups unpro-
tected. AMD offers the option of programming and pro-
tecting sector groups at its factory prior to shipping the
device through AMD’s ExpressFlash™ Service. Con-
tact an AMD representative for details.
Perform Erase or
Program Operations
It is possible to determine whether a sector group is
protected or unprotected. See “Autoselect Mode” for
details.
RESET# = VIH
Temporary Sector Group
Unprotect Completed
(Note 2)
Table 4. Sector Group Addresses
Sector
Group
SGA0
SGA1
SGA2
SGA3
SGA4
SGA5
SGA6
SGA7
SGA8
SGA9
SGA10
SGA11
SGA12
SGA13
SGA14
SGA15
A21
A20
A19
A18
Sectors
0
0
0
0
SA0–SA3
0
0
0
1
SA4–SA7
Notes:
0
0
1
0
SA8–SA11
SA12–SA15
SA16–SA19
SA20–SA23
SA24–SA27
SA28–SA31
SA32–SA35
SA36–SA39
SA40–SA43
SA44–SA47
SA48–SA51
SA52–SA55
SA56–SA59
SA60–SA63
1. All protected sector groups unprotected.
0
0
1
1
2. All previously protected sector groups are protected
once again.
0
1
0
0
0
1
0
1
Figure 1. Temporary Sector Group Unprotect
Operation
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
12
Am29F032B
than VLKO. The system must ensure that the control
pins are logically correct to prevent unintentional
Hardware Data Protection
The command sequence requirement of unlock cycles
for programming or erasing provides data protection.
In addition, the following hardware data protection
measures prevent accidental erasure or programming,
which might otherwise be caused by spurious system
level signals during VCC power-up and power-down
transitions, or from system noise.
writes when VCC is above VLKO
.
Write Pulse “Glitch” Protection
Noise pulses of less than 5 ns (typical) on OE#, CE#
or WE# do not initiate a write cycle.
Logical Inhibit
Write cycles are inhibited by holding any one of OE# =
VIL, CE# = VIH or WE# = VIH. To initiate a write cycle,
CE# and WE# must be at VIL while OE# is at VIH.
Low VCC Write Inhibit
When VCC is less than VLKO (see DC Characteristics
for voltage levels), the device does not accept any
write cycles. This protects data during VCC power-up
and power-down. The command register and all inter-
nal program/erase circuits are disabled. Under this
condition the device resets to the read mode. Subse-
quent writes are ignored until the VCC level is greater
Power-Up Write Inhibit
If WE# = CE# = VIL and OE# = VIH during power up,
the device does not accept commands on the rising
edge of WE#. The internal state machine is automati-
cally reset to the read mode on power-up.
COMMAND DEFINITIONS
Writing specific address and data commands or se-
quences into the command register initiates device op-
erations. The Command Definitions table defines the
valid register command sequences. Writing incorrect
address and data values or writing them in the im-
proper sequence resets the device to reading array
data.
See also “Requirements for Reading Array Data” in
the “Device Bus Operations” section for more informa-
tion. The Read Operations table provides the read pa-
rameters, and Read Operation Timings diagram
shows the timing diagram.
Reset Command
Writing the reset command to the device resets the
device to reading array data. Address bits are don’t
care for this command.
All addresses are latched on the falling edge of WE# or
CE#, whichever happens later. All data is latched on
the rising edge of WE# or CE#, whichever happens
first. Refer to the appropriate timing diagrams in the
“AC Characteristics” section.
The reset command may be written between the se-
quence cycles in an erase command sequence before
erasing begins. This resets the device to reading array
data. Once erasure begins, however, the device ig-
nores reset commands until the operation is complete.
Reading Array Data
The device is automatically set to reading array data
after device power-up. No commands are required to
retrieve data. The device is also ready to read array
data after completing an Embedded Program or Em-
bedded Erase algorithm.
The reset command may be written between the se-
quence cycles in a program command sequence be-
fore programming begins. This resets the device to
reading array data (also applies to programming in
Erase Suspend mode). Once programming begins,
however, the device ignores reset commands until the
operation is complete.
After the device accepts an Erase Suspend command,
the device enters the Erase Suspend mode. The sys-
tem can read array data using the standard read tim-
ings, except that if it reads at an address within erase-
suspended sectors, the device outputs status data.
After completing a programming operation in the
Erase Suspend mode, the system may once again
read array data with the same exception. See “Erase
Suspend/Erase Resume Commands” for more infor-
mation on this mode.
The reset command may be written between the se-
quence cycles in an autoselect command sequence.
Once in the autoselect mode, the reset command
must be written to return to reading array data (also
applies to autoselect during Erase Suspend).
If DQ5 goes high during a program or erase operation,
writing the reset command returns the device to read-
ing array data (also applies during Erase Suspend).
The system must issue the reset command to re-en-
able the device for reading array data if DQ5 goes
high, or while in the autoselect mode. See the “Reset
Command” section, next.
Am29F032B
13
hardware reset immediately terminates the program-
ming operation. The program command sequence
should be reinitiated once the device has reset to read-
ing array data, to ensure data integrity.
Autoselect Command Sequence
The autoselect command sequence allows the host
system to access the manufacturer and devices codes,
and determine whether or not a sector is protected.
The Command Definitions table shows the address
and data requirements. This method is an alternative to
that shown in the Autoselect Codes (High Voltage
Method) table, which is intended for PROM program-
mers and requires VID on address bit A9.
Programming is allowed in any sequence and across
sector boundaries. A bit cannot be programmed
from a “0” back to a “1”. Attempting to do so may
halt the operation and set DQ5 to “1”, or cause the
Data# Polling algorithm to indicate the operation was
successful. However, a succeeding read will show that
the data is still “0”. Only erase operations can convert
a “0” to a “1”.
The autoselect command sequence is initiated by
writing two unlock cycles, followed by the autoselect
command. The device then enters the autoselect
mode, and the system may read at any address any
number of times, without initiating another command
sequence.
Chip Erase Command Sequence
Chip erase is a six-bus-cycle operation. The chip erase
command sequence is initiated by writing two unlock
cycles, followed by a set-up command. Two additional
unlock write cycles are then followed by the chip erase
command, which in turn invokes the Embedded Erase
algorithm. The device does not require the system to
preprogram prior to erase. The Embedded Erase algo-
rithm automatically preprograms and verifies the entire
memory for an all zero data pattern prior to electrical
erase. The system is not required to provide any con-
trols or timings during these operations. The Command
Definitions table shows the address and data require-
ments for the chip erase command sequence.
A read cycle at address XX00h retrieves the manufac-
turer code. A read cycle at address XX01h returns the
device code. A read cycle containing a sector address
(SA) and the address 02h in returns 01h if that sector
is protected, or 00h if it is unprotected. Refer to the
Sector Address tables for valid sector addresses.
The system must write the reset command to exit the
autoselect mode and return to reading array data.
Byte Program Command Sequence
Programming is a four-bus-cycle operation. The pro-
gram command sequence is initiated by writing two un-
lock write cycles, followed by the program set-up
command. The program address and data are written
next, which in turn initiate the Embedded Program al-
gorithm. The system is not required to provide further
controls or timings. The device automatically provides
internally generated program pulses and verify the pro-
grammed cell margin. The Command Definitions take
shows the address and data requirements for the byte
program command sequence.
Any commands written to the chip during the Embed-
ded Erase algorithm are ignored. Note that a hardware
reset during the chip erase operation immediately ter-
minates the operation. The Chip Erase command se-
quence should be reinitiated once the device has
returned to reading array data, to ensure data integrity.
The system can determine the status of the erase
operation by using DQ7, DQ6, DQ2, or RY/BY#. See
“The Erase Resume command is valid only during
the Erase Suspend mode.” for information on these
status bits. When the Embedded Erase algorithm is
complete, the device returns to reading array data
and addresses are no longer latched.
When the Embedded Program algorithm is complete,
the device then returns to reading array data and ad-
dresses are no longer latched. The system can deter-
mine the status of the program operation by using DQ7,
DQ6, or RY/BY#. See “Write Operation Status” for in-
formation on these status bits.
Figure 3 illustrates the algorithm for the erase opera-
tion. See the Erase/Program Operations tables in “AC
Characteristics” for parameters, and to the Chip/Sector
Erase Operation Timings for timing waveforms.
Any commands written to the device during the Em-
bedded Program Algorithm are ignored. Note that a
14
Am29F032B
otherwise the last address and command might not be
accepted, and erasure may begin. It is recommended
that processor interrupts be disabled during this time to
ensure all commands are accepted. The interrupts can
be re-enabled after the last Sector Erase command is
written. If the time between additional sector erase
commands can be assumed to be less than 50 µs, the
system need not monitor DQ3. Any command other
than Sector Erase or Erase Suspend during the
time-out period resets the device to reading array
data. The system must rewrite the command sequence
and any additional sector addresses and commands.
START
Write Program
Command Sequence
Data Poll
from System
Embedded
Program
algorithm
in progress
The system can monitor DQ3 to determine if the sector
erase timer has timed out. (See the “DQ3: Sector Erase
Timer” section.) The time-out begins from the rising
edge of the final WE# pulse in the command sequence.
Verify Data?
Yes
No
Once the sector erase operation has begun, only the
Erase Suspend command is valid. All other commands
are ignored. Note that a hardware reset during the
sector erase operation immediately terminates the op-
eration. The Sector Erase command sequence should
be reinitiated once the device has returned to reading
array data, to ensure data integrity.
No
Increment Address
Last Address?
Yes
When the Embedded Erase algorithm is complete, the
device returns to reading array data and addresses are
no longer latched. The system can determine the sta-
tus of the erase operation by using DQ7, DQ6, DQ2, or
RY/BY#. Refer to “The Erase Resume command is
valid only during the Erase Suspend mode.” for infor-
mation on these status bits.
Programming
Completed
Note: See Table 5 for program command sequence.
Figure 2. Program Operation
Figure 3 illustrates the algorithm for the erase opera-
tion. Refer to the Erase/Program Operations tables in
the “AC Characteristics” section for parameters, and to
the Sector Erase Operations Timing diagram for timing
waveforms.
Sector Erase Command Sequence
Sector erase is a six bus cycle operation. The sector
erase command sequence is initiated by writing two un-
lock cycles, followed by a set-up command. Two addi-
tional unlock write cycles are then followed by the
address of the sector to be erased, and the sector
erase command. The Command Definitions table
shows the address and data requirements for the sec-
tor erase command sequence.
Erase Suspend/Erase Resume Commands
The Erase Suspend command allows the system to in-
terrupt a sector erase operation and then read data
from, or program data to, any sector not selected for
erasure. This command is valid only during the sector
erase operation, including the 50 µs time-out period
during the sector erase command sequence. The
Erase Suspend command is ignored if written during
the chip erase operation or Embedded Program algo-
rithm. Writing the Erase Suspend command during the
Sector Erase time-out immediately terminates the
time-out period and suspends the erase operation. Ad-
dresses are “don’t-cares” when writing the Erase Sus-
pend command.
The device does not require the system to preprogram
the memory prior to erase. The Embedded Erase algo-
rithm automatically programs and verifies the sector for
an all zero data pattern prior to electrical erase. The
system is not required to provide any controls or tim-
ings during these operations.
After the command sequence is written, a sector erase
time-out of 50 µs begins. During the time-out period,
additional sector addresses and sector erase com-
mands may be written. Loading the sector erase buffer
may be done in any sequence, and the number of sec-
tors may be from one sector to all sectors. The time be-
tween these additional cycles must be less than 50 µs,
When the Erase Suspend command is written during a
sector erase operation, the device requires a maximum
of 20 µs to suspend the erase operation. However,
when the Erase Suspend command is written during
the sector erase time-out, the device immediately ter-
Am29F032B
15
minates the time-out period and suspends the erase
operation.
Erase Suspend command can be written after the de-
vice has resumed erasing.
After the erase operation has been suspended, the
system can read array data from or program data to
any sector not selected for erasure. (The device “erase
suspends” all sectors selected for erasure.) Normal
read and write timings and command definitions apply.
Reading at any address within erase-suspended sec-
tors produces status data on DQ7–DQ0. The system
can use DQ7, or DQ6 and DQ2 together, to determine
if a sector is actively erasing or is erase-suspended.
See “The Erase Resume command is valid only during
the Erase Suspend mode.” for information on these
status bits.
START
Write Erase
Command Sequence
Data Poll
from System
Embedded
After an erase-suspended program operation is com-
plete, the system can once again read array data within
non-suspended sectors. The system can determine
the status of the program operation using the DQ7 or
DQ6 status bits, just as in the standard program oper-
ation. See “The Erase Resume command is valid only
during the Erase Suspend mode.” for more information.
Erase
algorithm
in progress
No
Data = FFh?
Yes
The system may also write the autoselect command
sequence when the device is in the Erase Suspend
mode. The device allows reading autoselect codes
even at addresses within erasing sectors, since the
codes are not stored in the memory array. When the
device exits the autoselect mode, the device reverts to
the Erase Suspend mode, and is ready for another
valid operation. See “Autoselect Command Sequence”
for more information.
Erasure Completed
Notes:
1. See the appropriate Command Definitions table for erase
command sequence.
2. See “DQ3: Sector Erase Timer” for more information.
The system must write the Erase Resume command
(address bits are “don’t care”) to exit the erase suspend
mode and continue the sector erase operation. Further
writes of the Resume command are ignored. Another
Figure 3. Erase Operation
16
Am29F032B
Command Definitions
Table 5. Am29F032B Command Definitions
Bus Cycles (Notes 2–4)
Command
Sequence
(Note 1)
First
Second
Third
Addr
Fourth
Fifth
Sixth
Addr Data Addr Data
Data Addr Data Addr Data Addr Data
Read (Note 5)
Reset (Note 6)
Manufacturer ID
1
1
4
4
RA
XXX
555
555
RD
F0
AA
AA
2AA
2AA
55
55
555
555
90
90
X00
X01
01
41
Autoselect
Device ID
(Note 7)
XX00
XX01
PD
Sector Group Protect
Verify (Note 8)
SGA
X02
4
555
AA
2AA
55
555
90
Program
4
6
6
1
1
555
555
AA
AA
AA
B0
30
2AA
2AA
2AA
55
55
55
555
555
555
A0
80
80
PA
555
555
Chip Erase
AA
2AA
2AA
55
55
555
SA
10
30
Sector Erase
555
AA
Erase Suspend (Note 9)
Erase Resume (Note 10)
XXX
XXX
Legend:
X = Don’t care
PD = Data to be programmed at location PA. Data latches on
the rising edge of WE# or CE# pulse, whichever happens first.
RA = Address of the memory location to be read.
SA = Address of the sector to be verified (in autoselect mode)
or erased. Address bits A21–A16 select a unique sector.
RD = Data read from location RA during read operation.
PA = Address of the memory location to be programmed.
Addresses latch on the falling edge of the WE# or CE# pulse,
whichever happens later.
SGA = Address of the sector group to be verified. Address
bits A21–A18 select a unique sector group.
Notes:
1. See Table 1 for description of bus operations.
7. The fourth cycle of the autoselect command sequence is
a read cycle.
2. All values are in hexadecimal.
8. The data is 00h for an unprotected sector group and 01h
for a protected sector group.See “Autoselect Command
Sequence” for more information.
3. Except when reading array or autoselect data, all bus
cycles are write operations.
4. Address bits A21–A11 are don’t cares for unlock and
command cycles, unless SA or PA required.
9. The system may read and program in non-erasing
sectors, or enter the autoselect mode, when in the Erase
Suspend mode. The Erase Suspend command is valid
only during a sector erase operation.
5. No unlock or command cycles required when reading
array data.
6. The Reset command is required to return to reading array
data when device is in the autoselect mode, or if DQ5
goes high (while the device is providing status data).
10. The Erase Resume command is valid only during the
Erase Suspend mode.
Am29F032B
17
WRITE OPERATION STATUS
The device provides several bits to determine the sta-
tus of a write operation: DQ2, DQ3, DQ5, DQ6, DQ7,
and RY/BY#. Table 6 and the following subsections de-
scribe the functions of these bits. DQ7, RY/BY#, and
DQ6 each offer a method for determining whether a
program or erase operation is complete or in progress.
These three bits are discussed first.
rithms) figure in the “AC Characteristics” section illus-
trates this.
Table 6 shows the outputs for Data# Polling on DQ7.
Figure 4 shows the Data# Polling algorithm.
START
DQ7: Data# Polling
The Data# Polling bit, DQ7, indicates to the host
system whether an Embedded Algorithm is in
progress or completed, or whether the device is in
Erase Suspend. Data# Polling is valid after the rising
edge of the final WE# pulse in the program or erase
command sequence.
Read DQ7–DQ0
Addr = VA
During the Embedded Program algorithm, the device
outputs on DQ7 the complement of the datum pro-
grammed to DQ7. This DQ7 status also applies to pro-
gramming during Erase Suspend. When the
Embedded Program algorithm is complete, the device
outputs the datum programmed to DQ7. The system
must provide the program address to read valid status
information on DQ7. If a program address falls within a
protected sector, Data# Polling on DQ7 is active for ap-
proximately 2 µs, then the device returns to reading
array data.
Yes
DQ7 = Data?
No
No
DQ5 = 1?
Yes
During the Embedded Erase algorithm, Data# Polling
produces a “0” on DQ7. When the Embedded Erase al-
gorithm is complete, or if the device enters the Erase
Suspend mode, Data# Polling produces a “1” on DQ7.
This is analogous to the complement/true datum output
described for the Embedded Program algorithm: the
erase function changes all the bits in a sector to “1”;
prior to this, the device outputs the “complement,” or
“0.” The system must provide an address within any of
the sectors selected for erasure to read valid status in-
formation on DQ7.
Read DQ7–DQ0
Addr = VA
Yes
DQ7 = Data?
No
After an erase command sequence is written, if all sec-
tors selected for erasing are protected, Data# Polling
on DQ7 is active for approximately 100 µs, then the de-
vice returns to reading array data. If not all selected
sectors are protected, the Embedded Erase algorithm
erases the unprotected sectors, and ignores the se-
lected sectors that are protected.
PASS
FAIL
Notes:
1. VA = Valid address for programming. During a sector
erase operation, a valid address is an address within
any sector selected for erasure. During chip erase, a
valid address is any non-protected sector address.
When the system detects DQ7 has changed from the
complement to true data, it can read valid data at
DQ7–DQ0 on the following read cycles. This is be-
cause DQ7 may change asynchronously with
DQ0–DQ6 while Output Enable (OE#) is asserted low.
The Data# Polling Timings (During Embedded Algo-
2. DQ7 should be rechecked even if DQ5 = “1” because
DQ7 may change simultaneously with DQ5.
Figure 4. Data# Polling Algorithm
18
Am29F032B
The Write Operation Status table shows the outputs for
Toggle Bit I on DQ6. Refer to Figure 5 for the toggle bit
algorithm, and to the Toggle Bit Timings figure in the
“AC Characteristics” section for the timing diagram.
The DQ2 vs. DQ6 figure shows the differences be-
tween DQ2 and DQ6 in graphical form. See also the
subsection on “DQ2: Toggle Bit II”.
RY/BY#: Ready/Busy#
The RY/BY# is a dedicated, open-drain output pin that
indicates whether an Embedded Algorithm is in
progress or complete. The RY/BY# status is valid after
the rising edge of the final WE# pulse in the command
sequence. Since RY/BY# is an open-drain output, sev-
eral RY/BY# pins can be tied together in parallel with a
pull-up resistor to VCC
.
DQ2: Toggle Bit II
If the output is low (Busy), the device is actively erasing
or programming. (This includes programming in the
Erase Suspend mode.) If the output is high (Ready),
the device is ready to read array data (including during
the Erase Suspend mode), or is in the standby mode.
The “Toggle Bit II” on DQ2, when used with DQ6, indi-
cates whether a particular sector is actively erasing
(that is, the Embedded Erase algorithm is in progress),
or whether that sector is erase-suspended. Toggle Bit
II is valid after the rising edge of the final WE# pulse in
the command sequence.
Table 6 shows the outputs for RY/BY#. The timing dia-
grams for read, reset, program, and erase shows the
relationship of RY/BY# to other signals.
DQ2 toggles when the system reads at addresses
within those sectors that have been selected for era-
sure. (The system may use either OE# or CE# to con-
trol the read cycles.) But DQ2 cannot distinguish
whether the sector is actively erasing or is erase-sus-
pended. DQ6, by comparison, indicates whether the
device is actively erasing, or is in Erase Suspend, but
cannot distinguish which sectors are selected for era-
sure. Thus, both status bits are required for sector and
mode information. Refer to Table 6 to compare outputs
for DQ2 and DQ6.
DQ6: Toggle Bit I
Toggle Bit I on DQ6 indicates whether an Embedded
Program or Erase algorithm is in progress or complete,
or whether the device has entered the Erase Suspend
mode. Toggle Bit I may be read at any address, and is
valid after the rising edge of the final WE# pulse in the
command sequence (prior to the program or erase op-
eration), and during the sector erase time-out.
During an Embedded Program or Erase algorithm op-
eration, successive read cycles to any address cause
DQ6 to toggle. (The system may use either OE# or
CE# to control the read cycles.) When the operation is
complete, DQ6 stops toggling.
Figure 5 shows the toggle bit algorithm in flowchart
form, and the section “DQ2: Toggle Bit II” explains the
algorithm. See also the “DQ6: Toggle Bit I” subsection.
Refer to the Toggle Bit Timings figure for the toggle bit
timing diagram. The DQ2 vs. DQ6 figure shows the dif-
ferences between DQ2 and DQ6 in graphical form.
After an erase command sequence is written, if all
sectors selected for erasing are protected, DQ6 tog-
gles for approximately 100 µs, then returns to reading
array data. If not all selected sectors are protected,
the Embedded Erase algorithm erases the unpro-
tected sectors, and ignores the selected sectors that
are protected.
Reading Toggle Bits DQ6/DQ2
Refer to Figure 5 for the following discussion. When-
ever the system initially begins reading toggle bit sta-
tus, it must read DQ7–DQ0 at least twice in a row to
determine whether a toggle bit is toggling. Typically, a
system would note and store the value of the toggle bit
after the first read. After the second read, the system
would compare the new value of the toggle bit with the
first. If the toggle bit is not toggling, the device has
completed the program or erase operation. The sys-
tem can read array data on DQ7–DQ0 on the following
read cycle.
The system can use DQ6 and DQ2 together to deter-
mine whether a sector is actively erasing or is erase-
suspended. When the device is actively erasing (that is,
the Embedded Erase algorithm is in progress), DQ6
toggles. When the device enters the Erase Suspend
mode, DQ6 stops toggling. However, the system must
also use DQ2 to determine which sectors are erasing
or erase-suspended. Alternatively, the system can use
DQ7 (see the subsection on “DQ7: Data# Polling”).
However, if after the initial two read cycles, the system
determines that the toggle bit is still toggling, the
system also should note whether the value of DQ5 is
high (see the section on DQ5). If it is, the system
should then determine again whether the toggle bit is
toggling, since the toggle bit may have stopped tog-
gling just as DQ5 went high. If the toggle bit is no longer
toggling, the device has successfully completed the
program or erase operation. If it is still toggling, the
device did not complete the operation successfully, and
If a program address falls within a protected sector,
DQ6 toggles for approximately 2 µs after the program
command sequence is written, then returns to reading
array data.
DQ6 also toggles during the erase-suspend-program
mode, and stops toggling once the Embedded Pro-
gram algorithm is complete.
Am29F032B
19
the system must write the reset command to return to
reading array data.
erase command. If DQ3 is high on the second status
check, the last command might not have been ac-
cepted. Table 6 shows the outputs for DQ3.
The remaining scenario is that the system initially de-
termines that the toggle bit is toggling and DQ5 has not
gone high. The system may continue to monitor the
toggle bit and DQ5 through successive read cycles, de-
termining the status as described in the previous para-
graph. Alternatively, it may choose to perform other
system tasks. In this case, the system must start at the
beginning of the algorithm when it returns to determine
the status of the operation (top of Figure 5).
START
Read DQ7–DQ0
DQ5: Exceeded Timing Limits
DQ5 indicates whether the program or erase time has
exceeded a specified internal pulse count limit. Under
these conditions DQ5 produces a “1.” This is a failure
condition that indicates the program or erase cycle was
not successfully completed.
Read DQ7–DQ0
(Note 1)
The DQ5 failure condition may appear if the system
tries to program a “1” to a location that is previously pro-
grammed to “0.” Only an erase operation can change
a “0” back to a “1.” Under this condition, the device
halts the operation, and when the operation has ex-
ceeded the timing limits, DQ5 produces a “1.”
No
Toggle Bit
= Toggle?
Yes
No
Under both these conditions, the system must issue the
reset command to return the device to reading array
data.
DQ5 = 1?
Yes
DQ3: Sector Erase Timer
After writing a sector erase command sequence, the
system may read DQ3 to determine whether or not an
erase operation has begun. (The sector erase timer
does not apply to the chip erase command.) If addi-
tional sectors are selected for erasure, the entire time-
out also applies after each additional sector erase
command. When the time-out is complete, DQ3
switches from “0” to “1.” The system may ignore DQ3
if the system can guarantee that the time between ad-
ditional sector erase commands will always be less
than 50 µs. See also the “Sector Erase Command Se-
quence” section.
(Notes
1, 2)
Read DQ7–DQ0
Twice
Toggle Bit
= Toggle?
No
Yes
Program/Erase
Operation Not
Complete, Write
Reset Command
Program/Erase
Operation Complete
After the sector erase command sequence is written,
the system should read the status on DQ7 (Data# Poll-
ing) or DQ6 (Toggle Bit I) to ensure the device has ac-
cepted the command sequence, and then read DQ3. If
DQ3 is “1”, the internally controlled erase cycle has be-
gun; all further commands (other than Erase Suspend)
are ignored until the erase operation is complete. If
DQ3 is “0”, the device will accept additional sector
erase commands. To ensure the command has been
accepted, the system software should check the status
of DQ3 prior to and following each subsequent sector
Notes:
1. Read toggle bit twice to determine whether or not it is
toggling. See text.
2. Recheck toggle bit because it may stop toggling as DQ5
changes to “1”. See text.
Figure 5. Toggle Bit Algorithm
20
Am29F032B
Table 6. Write Operation Status
DQ7
DQ5
DQ2
Operation
(Note 1)
DQ6
(Note 2)
DQ3
N/A
1
(Note 1)
RY/BY#
Embedded Program Algorithm
Embedded Erase Algorithm
DQ7#
0
Toggle
Toggle
0
0
No toggle
Toggle
0
0
Standard
Mode
Reading within Erase
Suspended Sector
1
No toggle
0
N/A
Toggle
1
Erase
Suspend Reading within Non-Erase
Data
Data
Data
0
Data
N/A
Data
N/A
1
0
Mode
Suspended Sector
Erase-Suspend-Program
DQ7#
Toggle
Notes:
1. DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for further
details.
2. DQ5 switches to ‘1’ when an Embedded Program or Embedded Erase operation has exceeded the maximum timing limits.
See “DQ5: Exceeded Timing Limits” for more information.
Am29F032B
21
ABSOLUTE MAXIMUM RATINGS
Storage Temperature
Plastic Packages . . . . . . . . . . . . . . . –65°C to +150°C
20 ns
20 ns
Ambient Temperature
with Power Applied. . . . . . . . . . . . . . –55°C to +125°C
+0.8 V
Voltage with Respect to Ground
–0.5 V
–2.0 V
VCC (Note 1). . . . . . . . . . . . . . . . . .–2.0 V to 7.0 V
A9, OE#, RESET# (Note 2). . . . .–2.0 V to 13.0 V
All other pins (Note 1) . . . . . . . . . .–2.0 V to 7.0 V
Output Short Circuit Current (Note 3) . . . . . . 200 mA
20 ns
Notes:
Figure 6. Maximum Negative
Overshoot Waveform
1. Minimum DC voltage on input or I/O pins is –0.5 V.
During voltage transitions, inputs may overshoot VSS to
–2.0 V for periods of up to 20 ns. See Figure 6. Maximum
DC voltage on output and I/O pins is VCC + 0.5 V. During
voltage transitions, outputs may overshoot to VCC + 2.0 V
for periods up to 20 ns. See Figure 7.
20 ns
VCC
+2.0 V
VCC
+0.5 V
2. Minimum DC input voltage on A9, OE#, RESET# pins is
–0.5V. During voltage transitions, A9, OE#, RESET# pins
may overshoot VSS to –2.0 V for periods of up to 20 ns. See
Figure 6. Maximum DC input voltage on A9, OE#, and
RESET# is 13.0 V which may overshoot to 13.5 V for
periods up to 20 ns.
2.0 V
20 ns
20 ns
3. No more than one output shorted at a time. Duration of
the short circuit should not be greater than one second.
Stresses greater than those listed in this section may cause
permanent damage to the device. This is a stress rating only;
functional operation of the device at these or any other condi-
tions above those indicated in the operational sections of this
specification is not implied. Exposure of the device to absolute
maximum rating conditions for extended periods may affect de-
vice reliability.
Figure 7. Maximum Positive
Overshoot Waveform
OPERATING RANGES
Commercial (C) Devices
Ambient Temperature (TA) . . . . . . . . . . . 0°C to +70°C
Industrial (I) Devices
Ambient Temperature (TA) . . . . . . . . . –40°C to +85°C
Extended (E) Devices
Ambient Temperature (TA) . . . . . . . . –55°C to +125°C
VCC Supply Voltages
VCC for ± 5% devices . . . . . . . . . . .+4.75 V to +5.25 V
VCC for ± 10% devices . . . . . . . . . .+4.50 V to +5.50 V
Operating ranges define those limits between which the
functionality of the device is guaranteed.
22
Am29F032B
DC CHARACTERISTICS
TTL/NMOS Compatible
Parameter
Symbol
Parameter Description
Test Description
VIN = VSS to VCC, VCC = VCC Max
VCC = VCC Max, A9 = 12.0 V
VOUT = VSS to VCC, VCC = VCC Max
CE# = VIL, OE# = VIH
Min
Typ
Max
±1.0
50
Unit
µA
ILI
Input Load Current
ILIT
A9 Input Load Current
µA
ILO
Output Leakage Current
VCC Read Current (Note 1)
VCC Write Current (Notes 2, 3)
±1.0
40
µA
ICC1
ICC2
30
40
mA
mA
CE# = VIL, OE# = VIH
60
VCC Standby Current
(CE# Controlled)
ICC3
ICC4
CE# = VIH, RESET# = VIH
0.4
0.4
1.0
1.0
mA
mA
VCC Standby Current
(RESET# Controlled)
VCC = VCC Max, RESET# = VIL
VIL
Input Low Level
Input High Level
–0.5
2.0
0.8
V
V
VIH
VCC + 0.5
Voltage for Autoselect and Sector
Protect
VID
VCC = 5.0 V
11.5
12.5
0.45
V
VOL
VOH
Output Low Voltage
Output High Level
IOL = 12 mA, VCC = VCC Min
IOH = –2.5 mA VCC = VCC Min
V
V
V
2.4
3.2
VLKO
Low VCC Lock-out Voltage
4.2
CMOS Compatible
Parameter
Symbol
Parameter Description
Test Description
VIN = VSS to VCC, VCC = VCC Max
VCC = VCC Max, A9 = 12.0 V
VOUT = VSS to VCC, VCC = VCC Max
CE# = VIL, OE# = VIH
Min
Typ
Max
±1.0
50
Unit
µA
ILI
Input Load Current
ILIT
A9 Input Load Current
Output Leakage Current
VCC Read Current (Note 1)
VCC Write Current (Notes 2, 3)
µA
ILO
±1.0
40
µA
ICC1
ICC2
30
30
mA
mA
CE# = VIL, OE# = VIH
40
VCC Standby Current
(CE# Controlled)
CE# = VCC ± 0.5 V,
RESET# = VCC ± 0.5 V
ICC3
ICC4
1
1
5
5
µA
µA
VCC Standby Current
(RESET# Controlled)
RESET# = VSS ± 0.5 V
VIL
Input Low Level
Input High Level
–0.5
0.8
V
V
VIH
0.7x VCC
VCC + 0.3
Voltage for Autoselect
and Sector Protect
VID
VCC = 5.0 V
11.5
12.5
0.45
V
VOL
VOH1
VOH2
VLKO
Output Low Voltage
IOL = 12 mA, VCC = VCC Min
V
V
V
V
IOH = –2.5 mA, VCC = VCC Min
0.85 VCC
VCC – 0.4
3.2
Output High Voltage
Low VCC Lock-out Voltage
IOH = –100 µA, VCC = VCC Min
4.2
Notes for DC Characteristics (both tables):
1. The ICC current is typically less than 1 mA/MHz, with OE# at VIH.
2. ICC active while Embedded Program or Embedded Erase algorithm is in progress.
3. Not 100% tested.
Am29F032B
23
TEST CONDITIONS
Table 7. Test Specifications
5.0 V
Test Condition
-75
All others Unit
2.7 kΩ
Output Load
1 TTL gate
100
Device
Under
Test
Output Load Capacitance, CL
(including jig capacitance)
30
5
pF
C
L
6.2 kΩ
Input Rise and Fall Times
Input Pulse Levels
20
ns
0.0–3.0 0.45–2.4
V
Input timing measurement
reference levels
1.5
1.5
0.8
2.0
V
V
Note: Diodes are IN3064 or equivalent
Output timing measurement
reference levels
Figure 8. Test Setup
KEY TO SWITCHING WAVEFORMS
WAVEFORM
INPUTS
OUTPUTS
Steady
Changing from H to L
Changing from L to H
Don’t Care, Any Change Permitted
Does Not Apply
Changing, State Unknown
Center Line is High Impedance State (High Z)
24
Am29F032B
AC CHARACTERISTICS
Read-only Operations
Parameter Symbol
Speed Options
Test
JEDEC
Std
Parameter Description
Read Cycle Time (Note 1)
Setup
-75
-90
-120
-150
Unit
tAVAV
tRC
Min
70
90
120
150
ns
CE# = VIL
OE# = VIL
tAVQV
tACC
Address to Output Delay
Max
70
90
120
150
ns
tELQV
tGLQV
tCE
tOE
Chip Enable to Output Delay
Output Enable to Output Delay
OE# = VIL Max
70
40
90
40
120
50
150
55
ns
ns
ns
Max
Min
Read
0
Output Enable Hold
tOEH
Toggle and
Data# Polling
Time (Note 1)
Min
Max
Max
Min
10
ns
ns
ns
ns
µs
Chip Enable to Output High Z
(Note 1)
tEHQZ
tGHQZ
tAXQX
tDF
20
20
20
20
30
30
35
35
Output Enable to Output High Z
(Note 1)
tDF
Output Hold Time From Addresses CE#
or OE# Whichever Occurs First
tOH
0
RESET# Pin Low to Read Mode
(Note 1)
tReady
Max
20
Notes:
1. Not 100% tested.
2. Refer to Figure 8 and Table 7 for test specifications.
tRC
Addresses Stable
Addresses
CE#
tACC
tDF
tOE
OE#
tOEH
WE#
tCE
tOH
HIGH Z
HIGH Z
Output Valid
Outputs
RESET#
RY/BY#
0 V
Figure 9. Read Operation Timings
Am29F032B
25
AC CHARACTERISTICS
Hardware Reset (RESET#)
Parameter
JEDEC
Std Description
Test Setup
All Speed Options
Unit
RESET# Pin Low (During Embedded
Algorithms) to Read or Write (See Note)
tREADY
Max
20
µs
RESET# Pin Low (NOT During Embedded
Algorithms) to Read or Write (See Note)
tREADY
Max
500
ns
tRP
tRH
tRB
RESET# Pulse Width
Min
Min
Min
500
50
0
ns
ns
ns
RESET# High Time Before Read (See Note)
RY/BY# Recovery Time
Note: Not 100% tested.
RY/BY#
CE#, OE#
RESET#
tRH
tRP
tReady
Reset Timings NOT during Embedded Algorithms
Reset Timings during Embedded Algorithms
tReady
RY/BY#
tRB
CE#, OE#
RESET#
tRP
Figure 10. RESET# Timings
26
Am29F032B
AC CHARACTERISTICS
Write (Erase/Program) Operations
Parameter
Speed Options
JEDEC
tAVAV
Std
tWC
tAS
Parameter Description
Write Cycle Time (Note 1)
-75
-90
-120
-150
Unit
ns
Min
Min
Min
Min
Min
70
90
120
150
tAVWL
Address Setup Time
Address Hold Time
Data Setup Time
Data Hold Time
0
ns
tWLAX
tDVWH
tWHDX
tAH
tDS
tDH
40
40
45
45
50
50
50
50
ns
ns
0
0
ns
Read Recover Time Before Write
(OE# high to WE# low)
tGHWL
tGHWL
Min
ns
tELWL
tWHEH
tWLWH
tWHWL
tWHWH1
tCS
tCH
CE# Setup Time
Min
Min
Min
Min
Typ
Typ
Max
Min
Min
0
0
ns
ns
CE# Hold Time
tWP
Write Pulse Width
Write Pulse Width High
40
45
50
50
ns
tWPH
20
7
ns
tWHWH1 Byte Programming Operation (Note 2)
µs
1
sec
sec
µs
tWHWH2
tWHWH2 Sector Erase Operation (Note 2)
8
tVCS
VCC Set Up Time (Note 1)
WE# to RY/BY# Valid
50
tBUSY
40
40
50
60
ns
Notes:
1. Not 100% tested.
2. See the “Erase And Programming Performance” section for more information.
Am29F032B
27
AC CHARACTERISTICS
Program Command Sequence (last two cycles)
Read Status Data (last two cycles)
tAS
tWC
Addresses
555h
PA
PA
PA
tAH
CE#
OE#
tCH
tWHWH1
tWP
WE#
Data
tWPH
tCS
tDS
tDH
PD
DOUT
A0h
Status
tBUSY
tRB
RY/BY#
VCC
tVCS
Note: PA = program address, PD = program data, DOUT is the true data at the program address.
Figure 11. Program Operation Timings
28
Am29F032B
AC CHARACTERISTICS
tAS
SA
tWC
2AAh
VA
VA
Addresses
CE#
555h for chip erase
tAH
tCH
OE#
tWP
WE#
tWPH
tWHWH2
tCS
tDS
tDH
In
Data
Complete
55h
30h
Progress
10 for Chip Erase
tBUSY
tRB
RY/BY#
VCC
tVCS
Note: SA = Sector Address. VA = Valid Address for reading status data.
Figure 12. Chip/Sector Erase Operation Timings
Am29F032B
29
AC CHARACTERISTICS
tRC
VA
Addresses
VA
VA
tACC
tCE
CE#
tCH
tOE
OE#
WE#
tOEH
tDF
tOH
High Z
High Z
DQ7
Valid Data
Complement
Complement
True
DQ0–DQ6
Status Data
True
Valid Data
Status Data
tBUSY
RY/BY#
Note:
VA = Valid address. Illustration shows first status cycle after command sequence, last status read cycle, and array data read cycle.
Figure 13. Data# Polling Timings (During Embedded Algorithms)
tRC
Addresses
CE#
VA
tACC
tCE
VA
VA
VA
tCH
tOE
OE#
WE#
tOEH
tDF
tOH
High Z
DQ6/DQ2
RY/BY#
Valid Status
(first read)
Valid Status
Valid Status
Valid Data
(second read)
(stops toggling)
tBUSY
Note:
VA = Valid address; not required for DQ6. Illustration shows first two status cycle after command sequence, last status read cycle,
and array data read cycle.
Figure 14. Toggle Bit Timings (During Embedded Algorithms)
30
Am29F032B
AC CHARACTERISTICS
Enter
Embedded
Erasing
Erase
Suspend
Enter Erase
Suspend Program
Erase
Resume
Erase
Erase Suspend
Read
Erase
Suspend
Program
Erase
Complete
WE#
Erase
Erase Suspend
Read
DQ6
DQ2
Note: The system may use OE# or CE# to toggle DQ2 and DQ6. DQ2 toggles only when read at an address within the
erase-suspended sector.
Figure 15. DQ2 vs. DQ6
Temporary Sector Unprotect
Parameter
JEDEC
Std
Description
All Speed Options
Unit
tVIDR
VID Rise and Fall Time (See Note)
Min
Min
500
ns
RESET# Setup Time for Temporary Sector
Unprotect
tRSP
4
µs
Note: Not 100% tested.
12 V
RESET#
0 or 5 V
0 or 5 V
tVIDR
tVIDR
Program or Erase Command Sequence
CE#
WE#
tRSP
RY/BY#
Figure 16. Temporary Sector Group Unprotect Timings
Am29F032B
31
AC CHARACTERISTICS
Write (Erase/Program) Operations—Alternate CE# Controlled Writes
Parameter Symbol
Speed Options
JEDEC
tAVAV
Std
tWC
Parameter Description
Write Cycle Time (Note 1)
-75
-90
-120
-150
Unit
ns
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
Typ
Typ
Max
70
90
120
150
tAVEL
tAS
Address Setup Time
Address Hold Time
0
ns
tELAX
tAH
40
40
45
45
50
50
50
50
ns
tDVEH
tEHDX
tGHEL
tWLEL
tEHWH
tELEH
tEHEL
tWHWH1
tDS
Data Setup Time
ns
tDH
Address Hold Time
0
0
0
0
ns
tGHEL
tWS
Read Recover Time Before Write
CE# Setup Time
ns
ns
tWH
CE# Hold Time
ns
tCP
Write Pulse Width
40
45
50
50
ns
tCPH
tWHWH1
Write Pulse Width High
Byte Programming Operation (Note 2)
20
7
ns
µs
1
sec
sec
tWHWH2
tWHWH2
Sector Erase Operation (Note 2)
8
Notes:
1. Not 100% tested.
2. See the “Erase And Programming Performance” section for more information.
32
Am29F032B
AC CHARACTERISTICS
555 for program
PA for program
2AA for erase
SA for sector erase
555 for chip erase
Data# Polling
Addresses
PA
tWC
tWH
tAS
tAH
WE#
OE#
tGHEL
tWHWH1 or 2
tCP
CE#
Data
tWS
tCPH
tDS
tBUSY
tDH
DQ7#
DOUT
tRH
A0 for program
55 for erase
PD for program
30 for sector erase
10 for chip erase
RESET#
RY/BY#
Notes:
1. PA = Program Address, PD = Program Data, SA = Sector Address, DQ7# = Complement of Data Input, DOUT = Array Data.
2. Figure indicates the last two bus cycles of the command sequence.
Figure 17. Alternate CE# Controlled Write Operation Timings
Am29F032B
33
ERASE AND PROGRAMMING PERFORMANCE
Parameter
Sector Erase Time
Typ (Note 1)
Max (Note 2)
Unit
sec
sec
µs
Comments
1
64
8
Excludes 00h programming prior to
erasure (Note 4)
Chip Erase Time
Byte Programming Time
Chip Programming Time (Note 3)
7
300
Excludes system-level overhead
(Note 5)
28.8
86.4
sec
Notes:
1. Typical program and erase times assume the following conditions: 25°C, 5.0 V VCC, 1,000,000 cycles. Additionally,
programming typicals assume checkerboard pattern.
2. Under worst case conditions of 90°C, VCC = 4.5 V, 1,000,000 cycles (4.75 V for -75).
3. The typical chip programming time is considerably less than the maximum chip programming time listed, since most bytes
program faster than the maximum byte program time listed. If the maximum byte program time given is exceeded, only then does
the device set DQ5 = 1. See the section on DQ5 for further information.
4. In the pre-programming step of the Embedded Erase algorithm, all bytes are programmed to 00h before erasure.
5. System-level overhead is the time required to execute the four-bus-cycle sequence for programming. See Table 5 for further
information on command definitions.
6. The device has a minimum erase and program cycle endurance of 1,000,000 cycles.
LATCHUP CHARACTERISTIC
Description
Input Voltage with respect to VSS on I/O pins
VCC Current
Min
Max
–1.0 V
VCC + 1.0 V
+100 mA
–100 mA
Note: Includes all pins except VCC. Test conditions: VCC = 5.0 Volt, one pin at a time.
TSOP AND SO PIN CAPACITANCE
Parameter
Symbol
Parameter Description
Input Capacitance
Test Conditions
Min
6
Max
7.5
12
Unit
CIN
VIN = 0
VOUT = 0
VIN = 0
pF
pF
pF
COUT
CIN2
Output Capacitance
8.5
7.5
Control Pin Capacitance
9
Notes:
1. Sampled, not 100% tested.
2. Test conditions TA = 25°C, f = 1.0 MHz.
DATA RETENTION
Parameter
Test Conditions
150°C
Min
10
Unit
Years
Years
Minimum Pattern Data Retention Time
125°C
20
34
Am29F032B
PHYSICAL DIMENSIONS
SO 044–44-Pin Small Outline Package
Dwg rev AC; 10/99
Am29F032B
35
PHYSICAL DIMENSIONS
TS 040–40-Pin Standard Thin Small Outline Package
Dwg rev AA; 10/99
36
Am29F032B
PHYSICAL DIMENSIONS
TSR040–40-Pin Reversed Thin Small Outline Package
Dwg rev AA; 10/99
Am29F032B
37
REVISION SUMMARY
Data Retention
Revision A (June 1998)
Added table.
Initial release.
Revision D (November 17, 1999)
Revision B (July 1998)
AC Characteristics—Figure 11. Program
Operations Timing and Figure 12. Chip/Sector
Erase Operations
Distinctive Characteristics
Changed typical active read current to 30 mA to match
DC Characteristics table.
Deleted tGHWL and changed OE# waveform to start at
high.
Operating Ranges
Corrected temperature range descriptions to “ambi-
ent.”
Physical Dimensions
Replaced figures with more detailed illustrations.
Revision C (January 1999)
Distinctive Characteristics
Revision D+1 (December 5, 2000)
Added table of contents.
Added 20-year data retention subbullet.
Ordering Information
Revision C+1 (April 14, 1999)
Deleted burn-in option.
Deleted duplicate sections in the full data sheet.
Trademarks
Copyright © 2000 Advanced Micro Devices, Inc. All rights reserved.
AMD, the AMD logo, and combinations thereof are registered trademarks of Advanced Micro Devices, Inc.
ExpressFlash is a trademark of Advanced Micro Devices, Inc.
Product names used in this publication are for identification purposes only and may be trademarks of their respective companies.
38
Am29F032B
相关型号:
©2020 ICPDF网 联系我们和版权申明