AM29LV081B-90EE AMD [Advanced Micro Devices], AM29LV081B-90EE Datasheet - Page 18

• Manufacturer Part Number: AM29LV081B-90EE
• Description: 8 Megabit (1 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory
• Manufacturer: AMD [Advanced Micro Devices]

Command Definitions
Legend:
X = Don’t care
RA = Address of the memory location to be read.
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.
Notes:
1. See Table 1 for description of bus operations.
2. All values are in hexadecimal.
3. Except when reading array or autoselect data, all bus cycles
4. All address bits are don’t cares for unlock and command
5. No unlock or command cycles required when reading array
6. The Reset command is required to return to reading array
7. The fourth cycle of the autoselect command sequence is a
16
Read (Note 5)
Reset (Note 6)
Auto-
select
(Note 7)
Program
Unlock Bypass
Unlock Bypass Program (Note 9)
Unlock Bypass Reset (Note 10)
Chip Erase
Sector Erase
Erase Suspend (Note 11)
Erase Resume (Note 12)
are write operations.
cycles, except when SA or PA required.
data.
data when device is in the autoselect mode, or if DQ5 goes
high (while the device is providing status data).
read cycle.
Manufacturer ID
Device ID
Sector Protect Verify
(Note 8)
Command
Sequence
(Note 1)
Table 4. Am29LV081B Command Definitions
1
1
4
4
4
4
3
2
2
6
6
1
1
Addr
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
RA
First
Data
RD
AA
AA
AA
AA
AA
AA
AA
A0
B0
F0
90
30
D A T A S H E E T
Am29LV081B
Addr
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
Second
Data
PD
55
55
55
55
55
00
55
55
PD = Data to be programmed at location PA. Data latches on the
rising edge of WE# or CE# pulse, whichever happens first.
SA = Address of the sector to be verified (in autoselect mode) or
erased. Address bits A19–A13 uniquely select any sector.
8. The data is 00h for an unprotected sector and 01h for a
9. The Unlock Bypass command is required prior to the Unlock
10. The Unlock Bypass Reset command is required to return to
11. The system may read and program in non-erasing sectors, or
12. The Erase Resume command is valid only during the Erase
protected sector. See “Autoselect Command Sequence” for
more information.
Bypass Program command.
reading array data when the device is in the unlock bypass
mode.
enter the autoselect mode, when in the Erase Suspend
mode. The Erase Suspend command is valid only during a
sector erase operation.
Suspend mode.
Addr
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
Bus Cycles (Notes 2-4)
Third
Data Addr
A0
90
90
90
20
80
80
(SA)
XXX
XXX
X00
X01
X02
PA
Fourth
Data
PD
AA
AA
01
38
00
01
21525D6 October 12, 2006
Addr Data
XXX
XXX
Fifth
55
55
Addr
XXX
SA
Sixth
Data
10
30