August 28, 2002
Am45DL32x8G
31
PR ELI M I NARY
Table 16.
Command Definitions (Flash Word Mode)
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#f pulse, whichever happens
later.
PD = Data to be programmed at location PA. Data latches on the rising
edge of WE# or CE#f pulse, whichever happens first.
SADD = Address of the sector to be verified (in autoselect mode) or
erased. Address bits A20–A12 uniquely select any sector.
BA = Address of the bank that is being switched to autoselect mode, is
in bypass mode, or is being erased.
Notes:
1.
See
Table 1 for description of bus operations.
2.
All values are in hexadecimal.
3.
Except for the read cycle and the fourth cycle of the autoselect
command sequence, all bus cycles are write cycles.
4.
Data bits DQ15–DQ8 are don’t care in command sequences,
except for RD and PD.
5.
Unless otherwise noted, address bits A20–A12 are don’t cares.
6.
No unlock or command cycles required when bank is in read
mode.
7.
The Reset command is required to return to reading array data
(or to the erase-suspend-read mode if previously in Erase
Suspend) when a bank is in the autoselect mode, or if DQ5 goes
high (while the bank is providing status information).
8.
The fourth cycle of the autoselect command sequence is a read
cycle. The system must provide the bank address to obtain the
manufacturer ID, device ID, or SecSi Sector factory protect
more information.
9.
The data is 82h for factory locked and 02h for not factory locked.
10. The data is 00h for an unprotected sector/sector block and 01h
for a protected sector/sector block.
11. The Unlock Bypass command is required prior to the Unlock
Bypass Program command.
12. The Unlock Bypass Reset command is required to return to
reading array data when the bank is in the unlock bypass mode.
13. 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, and requires the bank address.
14. The Erase Resume command is valid only during the Erase
Suspend mode, and requires the bank address.
15. Command is valid when device is ready to read array data or when
device is in autoselect mode.
Table 17.
Autoselect Device IDs (Word Mode)
T = Top Boot Sector, B = Bottom Boot Sector
Command
Sequence
C
ycl
es
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
u
to
se
le
ct
(
Manufacturer ID
4
555
AA
2AA
55
(BA)555
90
(BA)X00
0001
Device ID
4
555
AA
2AA
55
(BA)555
90
SecSi Sector Factory
4
555
AA
2AA
55
(BA)555
90
(BA)X03
0082/0002
Sector Protect Verify
4
555
AA
2AA
55
(BA)555
90
(SADD)
X02
0000/0001
Enter SecSi Sector Region
3
555
AA
2AA
55
555
88
Exit SecSi Sector Region
4
555
AA
2AA
55
555
90
XXX
00
Program
4
555
AA
2AA
55
555
A0
PA
PD
Unlock Bypass
3
555
AA
2AA
55
555
20
Unlock Bypass Program
2
XXX
A0
PA
PD
2
BA
90
XXX
00
Chip Erase
6
555
AA
2AA
55
555
80
555
AA
2AA
55
555
10
Sector Erase
6
555
AA
2AA
55
555
80
555
AA
2AA
55
SADD
30
1
BA
B0
1
BA
30
1
55
98
Device
Autoselect Device ID
Am29DL322G
2255h (T), 2256h (B)
Am29DL323G
2250h (T), 2253h (B)
Am29DL324G
225Ch (T), 225Fh (B)