S29PL-J SPANSION [SPANSION], S29PL-J Datasheet - Page 51

• Manufacturer Part Number: S29PL-J
• Description: CMOS 3.0 Volt-only, Simultaneous-Read/Write Flash Memory with Enhanced VersatileIO Control
• Manufacturer: SPANSION [SPANSION]

September 22, 2006 S29PL-J_00_A9
Temporary Sector
Unprotect Mode
D a t a
Sector Protect
from RESET#
Remove V ID
Device failed
Write reset
Increment
command
complete
PLSCNT
PLSCNT
= 25?
No
Yes
S h e e t
Figure 13.1 In-System Sector Protection/Sector Unprotection Algorithms
Sector Protect
No
No
Write 60h to sector
A7-A0 = 00000010
Protect: Write 40h
Algorithm
to sector address
Sector Protect:
Protect another
RESET# = V
sector address
Sector Protect
from RESET#
Set up sector
Verify Sector
with A7-A0 =
Cycle = 60h?
with A7-A0 =
Remove V
PLSCNT = 1
address with
Wait 150 µs
Data = 01h?
Write reset
Read from
First Write
00000010
00000010
command
Wait 1 μs
complete
address
START
sector?
( A d v a n c e
Yes
Yes
No
ID
ID
Yes
PLSCNT = 1
S29PL-J
Reset
I n f o r m a t i o n )
The indicated portion
Protect all sectors:
unprotected sectors
of the sector protect
prior to issuing the
unprotect address
algorithm must be
performed for all
first sector
Sector Protect
from RESET#
Remove V ID
Device failed
Write reset
command
Increment
complete
PLSCNT
PLSCNT
= 1000?
Yes
No
Sector Unprotect
No
No
Algorithm
Write 60h to sector
Set up first sector
Sector Unprotect:
Unprotect: Write
Sector Unprotect
sector address
RESET# = V
Verify Sector
40h to sector
with A7-A0 =
from RESET#
address with
PLSCNT = 1
Cycle = 60h?
address with
Remove V
Data = 00h?
Write reset
Wait 15 ms
Read from
First Write
Last sector
01000010
00000010
00000010
protected?
command
Wait 1 μs
All sectors
A7-A0 =
A7-A0 =
complete
address
verified?
START
Yes
Yes
Yes
Yes
ID
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up
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