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