Table 12. Am29DL640H Command Definitions
Bus Cycles (Notes 2–5)
Command
Sequence
(Note 1)
First
Second
Third
Addr
Fourth
Fifth
Addr
Sixth
Addr
Addr Data Addr Data
Data
Addr
Data
Data
Data
Read (Note 6)
Reset (Note 7)
1
1
RA
XXX
555
AAA
555
AAA
555
RD
F0
Word
Byte
Word
Byte
2AA
555
2AA
555
2AA
(BA)555
(BA)AAA
(BA)555
(BA)AAA
(BA)555
Manufacturer ID
Device ID (Note 9)
4
6
AA
AA
55
55
90 (BA)X00
01
(BA)X01
90
(BA)X0E
(BA)X1C
(BA)X0F
(BA)X1E
7E
02
01
(BA)X02
Secured Silicon Sector Word
(BA)X03
Factory Protect (Note
10)
4
4
AA
AA
55
55
90
81/01
00/01
Byte
AAA
555
555
2AA
555
(BA)AAA
(BA)555
(BA)AAA
(BA)X06
Sector/Sector Block
Protect Verify
(Note 11)
Word
Byte
(SA)X02
90
AAA
(SA)X04
Word
Byte
Word
Byte
Word
Byte
Word
Byte
555
AAA
555
AAA
555
AAA
555
AAA
XXX
XXX
555
AAA
555
AAA
BA
2AA
555
2AA
555
2AA
555
2AA
555
PA
555
AAA
555
Enter Secured Silicon
Sector Region
3
4
4
3
AA
AA
AA
AA
55
55
55
55
88
Exit Secured Silicon Sector
Region
90
A0
20
XXX
PA
00
AAA
555
Program
PD
AAA
555
Unlock Bypass
AAA
Unlock Bypass Program (Note 12)
Unlock Bypass Reset (Note 13)
2
2
A0
90
PD
00
XXX
2AA
555
2AA
555
Word
555
AAA
555
555
AAA
555
2AA
555
2AA
555
555
Chip Erase
Byte
6
6
AA
AA
55
55
80
80
AA
AA
55
55
10
30
AAA
Word
Sector Erase
Byte
SA
AAA
AAA
Erase Suspend (Note 14)
Erase Resume (Note 15)
1
1
B0
30
BA
Word
CFI Query (Note 16)
Byte
55
1
98
AA
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.
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.
SA = Address of the sector to be verified (in autoselect mode) or
erased. Address bits A21–A12 uniquely select any sector. Refer to
Table 2 for information on sector addresses.
BA = Address of the bank that is being switched to autoselect mode, is
in bypass mode, or is being erased. A21–A19 uniquely select a bank.
Notes:
1. See Table 1 for description of bus operations.
2. All values are in hexadecimal.
9. The device ID must be read across the fourth, fifth, and sixth
cycles.
10. The data is 81h for factory locked, 40h for customer locked, and
01h for not factory/customer locked.
11. The data is 00h for an unprotected sector/sector block and 01h for
a protected sector/sector block.
12. The Unlock Bypass command is required prior to the Unlock
Bypass Program command.
13. The Unlock Bypass Reset command is required to return to the
read mode when the bank is in the unlock bypass mode.
14. 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, and requires the bank address.
15. The Erase Resume command is valid only during the Erase
Suspend mode, and requires the bank address.
16. Command is valid when device is ready to read array data or when
device is in autoselect mode.
3. Except for the read cycle and the fourth, fifth, and sixth cycle of
the autoselect command sequence, all bus cycles are write
cycles.
4. Data bits DQ15–DQ8 are don’t care in command sequences,
except for RD and PD.
5. Unless otherwise noted, address bits A21–A11 are don’t cares for
unlock and command cycles, unless SA or PA is required.
6. No unlock or command cycles required when bank is reading
array data.
7. The Reset command is required to return to the read mode (or to
the erase-suspend-read mode if previously in Erase Suspend)
when a bank is in the autoselect mode, or if DQ5 goes high (while
the bank is providing status information).
8. The fourth cycle of the autoselect command sequence is a read
cycle. The system must provide the bank address to obtain the
manufacturer ID, device ID, or Secured Silicon Sector factory
protect information. Data bits DQ15–DQ8 are don’t care. While
reading the autoselect addresses, the bank address must be the
same until a reset command is given. See the Autoselect
Command Sequence section for more information.
June 7, 2005
Am29DL640H
27
SPANSION [ SPANSION ]
