AS29LV800B-120SC ANADIGICS [ANADIGICS, Inc], AS29LV800B-120SC Datasheet - Page 14

• Manufacturer Part Number: AS29LV800B-120SC
• Manufacturer: ANADIGICS [ANADIGICS, Inc]

March 2001
Sector protect algorithm
3/22/01; V.1.0
Temporary sector
unprotect mode
PLSCNT=25?
Device failed
Increment
PLSCNT
No
Yes
No
No
write 60h to sector
to sector address
protect; write 40h
address with A6=0,
RESET# = V
Sector protect:
Read from sector
A6=0, A1=1,
Set up sector
Verify sector
A1=1, A0=0
A1=1, A0=0
Data=01h?
from RESET#
Sector protect
PLSCNT = 1
First Write
with A6=0,
Cycle=60h?
address with
Wait 150 µs
Wait 1 µs
Remove V
Write reset
another
command
complete
Protect
sector?
address
START
A0=0
Yes
ID
Yes
ID
No
Yes
Alliance Semiconductor
Sector unprotect algorithm
The shaded portion of
Protect all sectors:
algorithm must be
unprotected sectors
before calling the
the sector protct
initiated for all
sector unprotect
®
Device failed
PLSCNT
=1000?
Increment
PLSCNT
No
Yes
No
No
address with A6=1,
Sector unprotect:
write 60h to sector
to sector address
Sector unprotect
unprotect; write 40h
Read from sector
RESET# = V
sector address
from RESET#
A6=1, A1=1,
address with
A1=1, A0=0
PLSCNT = 1
A1=1, A0=0
First Write
Data=00h?
Cycle=60h?
All sectors
with A6=1,
Last sector
Remove V
Write reset
Set up first
Verify sector
Wait 1 µs
Wait 15 ms
protected?
command
complete
verified?
START
A0=0
ID
Yes
ID
Yes
Yes
Yes
No
No
Temporary sector
sector address
unprotect mode
AS29LV800
Set up next
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