AUSTIN SEMICONDUCTOR, INC.
Austin Semiconductor, Inc.
Sector Protect Algorithm Flow
START
PLSCNT = 1
RESET# = V
ID
Wait 1 ms
AS8FLC2M32
FLASH
Temporary
Sector
Unprotect Mode
No
First Write
Cycle = 60h?
Yes
Set
up
sector
address
Sector
Protect:
Write 60h to
sector
address
with
A7 = 0, A2 = 1,
A1 = 0
Wait 150 µs
Verify
Sector
Protect: Write 40h
to
sector address
with A7 = 0,
A2 = 1, A1 = 0
Read from
sector address
with A7 = 0,
A2 = 1, A1 = 0
No
Increment
PLSCNT
Reset
PLSCNT = 1
No
PLSCNT
= 25?
Yes
Data = 01h?
Yes
Yes
Device failed
Protect
another
sector?
No
Remove V
ID
from RESET#
Write reset
command
Sector
Protect
Algorithm
AS8FLC2M32B
Rev. 1.2 5/09
Sector
Protect
complete
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