D A T A S H E E T
Command Definitions
Table 8. Am29BL162C Command Definitions
Bus Cycles (Notes 2–5)
Command
Sequence
(Note 1)
First
Second
Third
Fourth
Fifth
Sixth
Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data
Read (Note 6)
1
1
4
4
RA
XXX
555
555
RD
F0
Reset (Note 7)
Manufacturer ID
AA
AA
2AA
2AA
55
55
555
555
90
90
X00
X01
01
Device ID, Bottom Boot Block
2203
0000
0001
0000
0001
(SA)
X02
Sector Protect Verify (Note 9)
Burst Mode Status (Note 10)
4
4
555
555
AA
AA
2AA
2AA
55
55
555
555
90
90
X03
CFI Query (Note 11)
Program
1
4
3
2
2
6
6
1
1
55
98
AA
AA
A0
90
555
555
XXX
XXX
555
555
XXX
XXX
2AA
2AA
PA
55
55
PD
00
55
55
555
555
A0
20
PA
PD
Unlock Bypass
Unlock Bypass Program (Note 12)
Unlock Bypass Reset (Note 13)
Chip Erase
XXX
2AA
2AA
AA
AA
B0
30
555
555
80
80
555
555
AA
AA
2AA
2AA
55
55
555
SA
10
30
Sector Erase
Erase Suspend (Note 14)
Erase Resume (Note 15)
Burst Mode
Burst Mode Enable
Burst Mode Disable
4
4
555
555
AA
AA
2AA
2AA
55
55
555
555
C0
C0
XXX
XXX
01
00
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.
SA = Address of the sector to be verified (in autoselect mode) or
erased. Address bits A19–A12 uniquely select any sector.
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.
Notes:
1. See Table 1 for description of bus operations.
2. All values are in hexadecimal.
10. The data is 00h if the device is in asynchronous mode and
01h if in synchronous (burst) mode.
11. 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 cycle of the
autoselect command sequence, all bus cycles are write
cycles.
12. The Unlock Bypass command is required prior to the Unlock
Bypass Program command.
4. Data bits DQ15–DQ8 are don’t cares for unlock and
command cycles.
13. The Unlock Bypass Reset command is required to return to
reading array data when the device is in the unlock bypass
mode.
5. Address bits A19–A11 are don’t cares for unlock and
command cycles, unless SA or PA required.
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.
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 DQ5 goes
high (while the device is providing status data).
15. The Erase Resume command is valid only during the Erase
Suspend mode.
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 “Reset Command” for more
information.
July 8, 2005
Am29BL162C
23
SPANSION [ SPANSION ]
