A29002/A290021 Series
Table 5. A29002/A290021 Command Definitions
Bus Cycles (Notes 2 - 4)
Command
Sequence
(Note 1)
First
Addr Data Addr
Second
Third
Fourth
Fifth
Sixth
Data
Addr Data
Addr Data
Addr Data Addr Data
Read (Note 5)
Reset (Note 6)
1
1
4
4
RA
RD
XXX F0
555 AA
555 AA
Manufacturer ID
2AA
2AA
55
55
555
555
90
90
X00
X01
37
Autoselect
(Note 7)
Top
Bottom
8C
0D
Device ID
7F
Continuation ID
4
4
555 AA
555 AA
2AA 55
555
555
90
90
X03
00
Sector Protect Verify
(Note 8)
SA
X02
2AA
55
01
Program
4
6
6
1
1
AA
555
2AA
2AA
2AA
55
55
55
555 A0
PA
555
555
PD
Chip Erase
Sector Erase
555 AA
555 AA
XXX B0
XXX 30
555
555
80
80
AA
AA
2AA
2AA 55
55
555
SA
10
30
Erase Suspend (Note 9)
Erase Resume (Note 10)
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
whichever happens later.
or
pulse,
CE
WE
PD = Data to be programmed at location PA. Data latches on the rising edge of
or
pulse, whichever happens first.
CE
WE
SA = Address of the sector to be verified (in autoselect mode) or erased. Address bits A17 - A13 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 A17 - A12 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/O5 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.
11. The time between each command cycle has to be less than 50ms.
(February, 2002, Version 1.0)
11
AMIC Technology, Inc.
AMICC [ AMIC TECHNOLOGY ]
