AUSTIN SEMICONDUCTOR, INC.
FLASH
AS8FLC1M32
Austin Semiconductor, Inc.
Command Definition Table
Bus Cycles (Notes 2-4)
Third Fourth
Command Sequence
(Note 1)
First
Second
Fifth
Sixth
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
READ (Note 5)
RESET (Note 6)
Manufacturer ID
1
RA
RD
1
4
4
XXX
AAA
AAA
F0
AA
AA
555
555
55
55
AAA
AAA
90
90
X00
X02
(SA)
X04
PA
01
5B
00
01
PD
Auto- Device ID, Btm. Boot
Select Sector Protect Verify
4
AAA
AA
555
55
AAA
90
(Note 7)
PROGRAM
(Note 8)
4
AAA
AA
555
55
AAA
AAA
A0
20
UNLOCK BYPASS
3
2
2
6
6
1
1
AAA
XXX
XXX
AAA
AAA
XXX
XXX
AA
A0
90
555
PA
55
PD
00
55
55
UNLOCK B(Note 9)
UNLOCK B(Note 10)
CHIP ERASE
PA
AA
AA
B0
30
555
555
AAA
AAA
80
80
AAA
AAA
AA
AA
555
555
55
55
AAA
SA
10
30
SECTOR ERASE
ERASE SUSPEND (Note 11)
ERASE RESUME (Note 12)
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 latched on the falling edge of WEx\ or CSx\ pulse,
whichever occurs later
PD = Data to be programmed at location PA. Data latches on the rising edge of WEx\ or CSx\ pulses,
whichever occurs later
SA = Address of the sector to be VERIFIED (in autoselect mode) or ERASED. Address bits A19-A13 uniquely
select any sector
Notes
8 . The data is 00h for an unprotected sector and 01h for
a protected sector.
1. See Table 1 for Valid Bus Operations
2 . All values in Hexadecimal
9 . The UNLOCK BYPASS Command is required prior to the
UNLOCK BYPASS PROGRAM Command.
10 . The UNLOCK BYPASS RESET Command is required to
3 . Except when READING array or autoselect data, all bus
cycles are WRITE Operations
4 . Address bits A19-A12 are don't cares for UNLOCK and
Command cycles
return to READING array data when the device is in the
UNLOCK BYPASS Mode
5 . No UNLOCK or Command cycles required when
READING array data
11 . The System may READ and PROGRAM in NON-ERASING
sectors, or enter the autoselect mode, when int the ERASE
SUSPEND Mode. The ERASE SUSPEND Command is
valid only during a sector ERASE Operation
6 . The RESET command is required to return to READING
array data when the device is in the AUTOSELECT
mode, or if DQ5, DQ13, DQ21, DQ29 goes high
(while the device is providing status data)
12 . The ERASE RESUME Command is valid only during the
ERASE SUSPEND Mode.
7 . The fourth cycle of the AUTOSELECT Command
sequence is a READ Cycle.
*Data is for single byte.
BYTE 1 = DQ0 - DQ7
BYTE 2 = DQ8 - DQ15
BYTE 3 = DQ16 - DQ23
BYTE 4 = DQ24 - DQ31
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
AS8FLC1M32B
Rev. 3.3 05/08
11
AUSTIN [ AUSTIN SEMICONDUCTOR ]
