AUSTIN SEMICONDUCTOR, INC.
FLASHFLASH
FLASHFLASH
FLASH
AS8FLC2M32
AS8FLC2M32B
Rev. 1.2 5/09
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
8
Austin Semiconductor, Inc.
Sector Un-Protect Algorithm Flow
Sector Unprotect:
Write 60h to sector
address with
A7 = 1, A2 = 1,
A1 = 0
Set up first sector
address
Wait 15 ms
Verify Sector
Unprotect: Write
40h to sector
address with
A7 = 1, A2 = 1,
A1 = 0
Read from
sector address
with A7 = 1,
A2 = 1, A1 = 0
STA RT
PLSCNT = 1
RESET# = V
ID
Wait 1 ms
Data = 00h?
Last sector
verified?
Remove V
ID
from RESET#
Write reset
command
Sector Unprotect
complete
Ye s
No
PLSCNT
= 1000?
Ye s
Device failed
Increment
PLSCNT
Temporary Sector
Unprotect Mode
No
All sectors
protected?
Ye s
Protect all sectors:
The indicated portion
of the sector protect
algorithm must be
performed for all
unprotected sectors
prior to issuing the
first sector
unprotect address
Set up
next sector
address
Ye s
No
No
Ye s
No
Sector Unprotect
Algorithm
First Write
Cycle = 60h?
