AM29LV641G AMD [Advanced Micro Devices], AM29LV641G Datasheet - Page 31

• Manufacturer Part Number: AM29LV641G
• 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.
2. All values are in hexadecimal.
3. Except for the read cycle and the fourth cycle of the autoselect
4. Data bits DQ15–DQ8 are don’t care in command sequences,
5. Unless otherwise noted, address bits A21–A15 are don’t cares.
6. No unlock or command cycles required when device is in read
7. The Reset command is required to return to the read mode (or to
8. The fourth cycle of the autoselect command sequence is a read
June 14, 2005
Read (Note 6)
Reset (Note 7)
Enter SecSi Sector Region
Exit SecSi Sector Region
Program
Unlock Bypass
Unlock Bypass Program (Note 11)
Unlock Bypass Reset (Note 12)
Chip Erase
Sector Erase
Erase Suspend (Note 13)
Erase Resume (Note 14)
CFI Query (Note 15)
See Table 1 for description of bus operations.
command sequence, all bus cycles are write cycles.
except for RD and PD.
mode.
the erase-suspend-read mode if previously in Erase Suspend)
when the device is in the autoselect mode, or if DQ5 goes high
(while the device is providing status information).
cycle. Data bits DQ15–DQ8 are don’t care. See the Autoselect
Command Sequence section for more information.
Manufacturer ID
Device ID
SecSi™ Sector Factory
Protect (Note 9)
Sector Group Protect Verify
(Note 10)
Command
Sequence
(Note 1)
3
2
2
1
1
4
4
4
4
3
4
4
6
6
1
1
1
A D V A N C E
Addr
XXX
XXX
XXX
555
555
555
555
555
555
555
555
555
555
RA
BA
BA
55
First
Table 10. Command Definitions
Data
RD
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
F0
A0
90
B0
30
98
Addr
2AA
2AA
2AA
2AA
2AA
2AA
2AA
2AA
XXX
2AA
2AA
PA
Second
Am29LV641G
Data
PD
I N F O R M A T I O N
55
55
55
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 A21–A15 uniquely select any sector.
9. If WP# protects the highest address sector, the data is 98h for
10. The data is 00h for an unprotected sector group and 01h for a
11. The Unlock Bypass command is required prior to the Unlock
12. The Unlock Bypass Reset command is required to return to the
13. The system may read and program in non-erasing sectors, or
14. The Erase Resume command is valid only during the Erase
15. Command is valid when device is ready to read array data or
16. Bottom boot = 2200 and top boot = 2201.
Addr
555
555
555
555
555
555
555
555
555
555
Third
Bus Cycles (Notes 2–5)
factory locked and 18h for not factory locked. If WP# protects the
lowest address sector, the data is 88h for factory locked and 08h
for not factor locked.
protected sector group.
Bypass Program command.
read mode 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.
when device is in autoselect mode.
Data
90
90
90
90
88
90
A0
20
80
80
(SA)X02
Addr
XXX
X00
X01
X03
555
555
PA
Fourth
Note 9)
XX00/
22E7
XX01
Data
0001
(see
PD
AA
AA
00
Addr
X0E
2AA
2AA
Fifth
Data
220F
55
55
Addr
X0F
555
SA
Sixth
(Note
Data
16)
10
30
32