s29jl032j Meet Spansion Inc., s29jl032j Datasheet - Page 25

• Manufacturer Part Number: s29jl032j
• Description: 32megabit 4m X 8-bit/2m X 16-bit Cmos 3.0volt-only, Simultaneous Read/write Flash Memory
• Manufacturer: Meet Spansion Inc.

January 27, 2010 S29JL032J_00_01
Sector Protect
Temporary Sector
Unprotect Mode
Device failed
Algorithm
Increment
PLSCNT
PLSCNT
= 25?
No
Yes
D a t a
No
No
Write 60h to sector
Protect: Write 40h
to sector address
A6 = 0, A1 = 1,
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Sector Protect:
Protect another
sector address
RESET# = V
Sector Protect
Set up sector
Verify Sector
from RESET#
Cycle = 60h?
with A6 = 0,
with A6 = 0,
address with
Remove V
Data = 01h?
PLSCNT = 1
Wait 150 µs
Write reset
Read from
First Write
Wait 1 ms
command
complete
address
START
A0 = 0
sector?
S h e e t
No
Yes
Yes
ID
ID
Yes
Figure 8.2 In-System Sector Protect/Unprotect Algorithms
( A d v a n c e
PLSCNT = 1
Reset
S29JL032J
The indicated portion
unprotected sectors
of the sector protect
prior to issuing the
Protect all sectors:
I n f o r m a t i o n )
unprotect address
algorithm must be
performed for all
Sector Unprotect
first sector
Algorithm
Device failed
Increment
= 1000?
PLSCNT
PLSCNT
Yes
No
No
No
Write 60h to sector
Set up first sector
Sector Unprotect:
Unprotect: Write
A6 = 1, A1 = 1,
Sector Unprotect
A6 = 1, A1 = 1,
A1 = 1, A0 = 0
sector address
RESET# = V
40h to sector
Verify Sector
address with
with A6 = 1,
from RESET#
Cycle = 60h?
address with
Remove V
PLSCNT = 1
Data = 00h?
Write reset
Wait 15 ms
First Write
Read from
Last sector
Wait 1 ms
protected?
command
All sectors
complete
verified?
address
A0 = 0
A0 = 0
START
Yes
Yes
Yes
Yes
ID
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up
25