
19
Command Definitions
Table 5.
Am29SL800C 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.
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–A12 uniquely select any sector.
Notes:
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 operations.
4. Data bits DQ15–DQ8 are don’t cares 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, unless SA or PA required.
7. The Reset command is required to return to reading array
data when device is in the autoselect mode, or if DQ5
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
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. The Erase Suspend command is valid
only during a sector erase operation.
13. The Erase Resume command is valid only during the Erase
Suspend mode.
Command
Sequence
Cy
c
le
s
First
Second
Third
Fourth
Fifth
Sixth
Addr
Data
Addr
Data
Addr
Data Addr
Data
Addr Data
Addr
Data
1
RA
RD
1
XXX
F0
A
uto
sel
ect
Manufacturer ID
Word
4
555
AA
2AA
55
555
90
X00
01
Byte
AAA
555
AAA
Device ID,
Top Boot Block
Word
4
555
AA
2AA
55
555
90
X01
22EA
Byte
AAA
555
AAA
X02
EA
Device ID,
Bottom Boot Block
Word
4
555
AA
2AA
55
555
90
X01
226B
Byte
AAA
555
AAA
X02
6B
Sector Protect Verify
Word
4
555
AA
2AA
55
555
90
(SA)
X02
XX00
XX01
Byte
AAA
555
AAA
(SA)
X04
00
01
Program
Word
4
555
AA
2AA
55
555
A0
PA
PD
Byte
AAA
555
AAA
Unlock Bypass
Word
3
555
AA
2AA
55
555
20
Byte
AAA
555
AAA
2
XXX
A0
PA
PD
2
XXX
90
XXX
00
Chip Erase
Word
6
555
AA
2AA
55
555
80
555
AA
2AA
55
555
10
Byte
AAA
555
AAA
555
AAA
Sector Erase
Word
6
555
AA
2AA
55
555
80
555
AA
2AA
55
SA
30
Byte
AAA
555
AAA
555
1
XXX
B0
1
XXX
30