s29jl064h Meet Spansion Inc., s29jl064h Datasheet - Page 25

• Manufacturer Part Number: s29jl064h
• Description: 64 Megabits 8 M X 8-bits / 4 M X 16-bits
• Manufacturer: Meet Spansion Inc.

September 19, 2007 S29JL064H_00_A7
Sector Protect
Temporary Sector
Unprotect Mode
Device failed
Algorithm
Increment
PLSCNT
PLSCNT
= 25?
No
Yes
No
No
Write 60h to sector
Protect: Write 40h
to sector address
A6 = 0, A1 = 1,
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Protect another
Sector Protect:
sector address
RESET# = V
Sector Protect
Verify Sector
Set up sector
with A6 = 0,
with A6 = 0,
from RESET#
Cycle = 60h?
address with
Remove V
PLSCNT = 1
Wait 150 µs
Data = 01h?
Write reset
Read from
First Write
command
Wait 1 µs
complete
address
A0 = 0
sector?
START
No
Yes
Yes
ID
Figure 8.2 In-System Sector Protect/Unprotect Algorithms
ID
Yes
D a t a
PLSCNT = 1
Reset
S h e e t
S29JL064H
The indicated portion
unprotected sectors
of the sector protect
prior to issuing the
Protect all sectors:
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,
A6 = 1, A1 = 1,
Sector Unprotect
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
protected?
command
Wait 1 µs
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
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