A29L800A Series
Table 5. A29L800A Command Definitions
Bus Cycles (Notes 2 - 5)
Command
Sequence
(Note 1)
First
Addr Data Addr Data
RA RD
Second
Third
Fourth
Fifth
Sixth
Addr Data Addr Data
Addr Data
Addr Data
1
1
Read (Note 6)
Reset (Note 7)
XXX F0
555
Word
Byte
Word
Byte
2AA
555
2AA
555
Manufacturer ID
4
4
AA
55
55
90 X00
37
AAA
AAA
555
B31A
1A
555
AA
AAA
X01
90
Device ID,
Top Boot Block
555
2AA
555
AAA
555
X02
Word
Byte
B39B
9B
555
AA
90
X01
X02
X03
Device ID,
Bottom Boot Block
55
4
4
AAA
AAA
Word
555
AA
2AA
555
Continuation ID
55
90
7F
Byte
Word
Byte
X06
PA
AAA
555
555
AAA
555
2AA
Program
4
3
AA
55
55
A0
20
PD
AAA
555
2AA
555
PA
AAA
555
AAA
Word
Byte
555
AAA
Unlock Bypass
AA
2
2
XXX A0
XXX 90
PD
00
Unlock Bypass Program (Note 10)
Unlock Bypass Reset (Note 11)
Word
XXX
2AA
555
2AA
555
555
AA
555
AAA
555
555
AAA
555
2AA
55
555
10
Chip Erase
6
6
55
55
80
80
AA
AA
Byte
AAA
555
AAA
Word
555
2AA
55
Sector Erase
AA
SA
30
Byte
AAA
AAA
AAA
555
1
1
XXX B0
XXX 30
Erase Suspend (Note 12)
Erase Resume (Note 13)
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
happens later.
or
pulse, whichever
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 A18 - A12 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. Data bits I/O15~I/O8 are don’t care for unlock and command cycles.
5. Address bits A18 - A11 are don't cares for unlock and command cycles, unless SA or PA required.
6. No unlock or command cycles required when reading array data.
7. 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).
8. The fourth cycle of the autoselect command sequence is a read cycle.
9. The data is 00h for an unprotected sector and 01h for a protected sector. See “Autoselect Command Sequence” for more information.
10. The Unlock Bypass command is required prior to the Unlock Bypass Program command.
11. The Unlock Bypass Reset command is required to return to reading array data when the device is in the unlock bypass mode.
12. The system may read and program in non-erasing sectors, or enter the autoselect mode, when in the Erase Suspend mode.
13. The Erase Resume command is valid only during the Erase Suspend mode.
(June, 2005, Version 1.1)
13
AMIC Technology, Corp.
AMICC [ AMIC TECHNOLOGY ]
