A29L040A Series
Table 4. A29L040A Command Definitions
Command
Sequence
(Note 1)
Read (Note 5)
Reset (Note 6)
Manufacturer ID
Device ID
Autoselect
(Note 7)
Continuation ID
Bus Cycles (Notes 2 - 4)
Cycles
First
Addr Data
RA
XXX
555
555
555
555
RD
F0
AA
AA
AA
AA
2AA
2AA
2AA
2AA
55
55
55
55
555
555
555
555
90
90
90
90
X00
X01
X03
SA
X02
PA
555
555
37
92
7F
00
01
PD
AA
AA
2AA
2AA
55
55
555
SA
10
30
Second
Addr Data
Third
Fourth
Fifth
Sixth
Addr Data Addr Data Addr Data Addr Data
1
1
4
4
4
Sector Protect Verify 4
(Note 8)
Program
Chip Erase
Sector Erase
Erase Suspend (Note 9)
Erase Resume (Note 10)
4
6
6
1
1
555
555
555
XXX
XXX
AA
AA
AA
B0
30
2AA
2AA
2AA
55
55
55
555
555
555
A0
80
80
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.
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 A18 - A16 select a unique sector.
Note:
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 are write operation.
4. Address bits A18 - A11 are don't cares for unlock and command cycles, unless SA or PA required.
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 I/O
5
goes high
(while the device is providing status data).
7. The fourth cycle of the autoselect command sequence is a read cycle.
8. The data is 00h for an unprotected sector and 01h for a protected sector. See "Autoselect Command Sequence" for more
information.
9. The system may read and program in non-erasing sectors, or enter the autoselect mode, when in the Erase Suspend mode.
10. The Erase Resume command is valid only during the Erase Suspend mode.
PRELIMINARY (March, 2005, Version 0.0)
10
AMIC Technology, Corp.
AMICC [ AMIC TECHNOLOGY ]
