AS29CF160T-55TIN
AS29CF160B-55TIN
START
START
Protect all sectors:
The indicated portion of
the sector protect
PLSCNT=1
PLSCNT=1
algorithm must be
performed for all
RESET=VID
RESET=VID
unprotected sectors prior
to issuing the first sector
unprotect address
Wait 1 us
Wait 1 us
No
No
No
Temporary Sector
Unprotect Mode
First Write
Cycle=60h?
First Write
Cycle=60h?
Temporary Sector
Unprotect Mode
Yes
Yes
Set up sector
address
All sectors
protected?
Sector Protect:
Write 60h to sector
address with A6=0,
A1=1, A0=0
Yes
Set up first sector
address
Sector Unprotect:
Write 60h to sector
address with A6=1,
A1=1, A0=0
Wait 150 us
Verify Sector
Protect: Write 40h
to sector address
with A6=0, A1=1,
A0=0
Reset
PLSCNT=1
Increment
PLSCNT
Wait 15 ms
Verify Sector
Unprotect : Write
40h to sector
address with A6=1,
A1=1, A0=0
Read from
sector address
with A6=0,
Increment
PLSCNT
A1=1, A0=0
No
Read from sector
address with A6=1,
A1=1, A0=0
No
PLSCNT
=25?
Data=01h?
Yes
No
Set up
next sector
address
Yes
No
PLSCNT=
1000?
Yes
Data=00h?
Yes
Protect another
sector?
Device failed
Yes
No
Remove VID
from RESET
No
Last sector
verified?
Device failed
Write reset
command
Yes
Remove VID
from RESET
Sector Protect
complete
Sector Protect
Algorithm
Sector Unprotect
Algorithm
Write reset
Command
Sector Unprotect
complete
Figure 2. In-System Sector Protect/Unprotect Algorithms
Confidential
- 11 of 41 -
Rev.1.0 July 2019
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
