AS29LV800B-120SCB View Datasheet(PDF) - ANADIGICS
Part Name
Description
MFG CO.
'AS29LV800B-120SCB' PDF : 25 Pages View PDF
March 2001
Sector protect algorithm
START
PLSCNT = 1
RESET# = VID
Wait 1 µs
Temporary sector
unprotect mode
Increment
PLSCNT
No
No
First Write
Cycle=60h?
Yes
Set up sector
address
Sector protect:
write 60h to sector
address with
A6=0, A1=1,
A0=0
Wait 150 µs
Verify sector
protect; write 40h
to sector address
with A6=0,
A1=1, A0=0
Read from sector
address with A6=0,
A1=1, A0=0
PLSCNT=25?
No
Data=01h?
Yes
Device failed
Yes
Protect
Yes
another
sector?
No
Remove VID
from RESET#
Write reset
command
Sector protect
complete
®
Sector unprotect algorithm
AS29LV800
START
PLSCNT = 1
RESET# = VID
Wait 1 µs
Protect all sectors:
The shaded portion of
the sector protct
algorithm must be
initiated for all
unprotected sectors
before calling the
sector unprotect
No
First Write
Temporary sector
Cycle=60h?
unprotect mode
Yes
No
All sectors
protected?
Yes
Sector unprotect:
write 60h to sector
address with
A6=1, A1=1,
A0=0
Wait 15 ms
Increment
PLSCNT
Set up first
sector address
Verify sector
unprotect; write 40h
to sector address
with A6=1,
A1=1, A0=0
Read from sector
No
address with A6=1,
A1=1, A0=0
PLSCNT
=1000?
No
Data=00h?
Set up next
sector address
Yes
Device failed
Yes
No
Last sector
verified?
Yes
Remove VID
from RESET#
Write reset
command
Sector unprotect
complete
3/22/01; V.1.0
Alliance Semiconductor
P. 14 of 25
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