S71PL129JB0BAW9Z0 Spansion Inc., S71PL129JB0BAW9Z0 Datasheet - Page 40

• Manufacturer Part Number: S71PL129JB0BAW9Z0
• Manufacturer: Spansion Inc.

Specifications of S71PL129JB0BAW9Z0

• Lead Free Status / RoHS Status: Compliant

38
Temporary Sector
Unprotect Mode
Sector Protect
from RESET#
Remove V
Device failed
Increment
Write reset
PLSCNT
PLSCNT
command
complete
= 25?
No
Yes
Sector Protect
ID
Algorithm
Figure 1. In-System Sector Protection/Sector Unprotection Algorithms
No
No
Write 60h to sector
Protect: Write 40h
to sector address
Protect another
Sector Protect:
sector address
RESET# = V
Sector Protect
from RESET#
Verify Sector
with A7-A0 =
Set up sector
PLSCNT = 1
Cycle = 60h?
address with
with A7-A0 =
Remove V
Wait 100 µs
Data = 01h?
Write reset
Read from
First Write
00000010
00000010
command
Wait 4 μs
00000010
A7-A0 =
complete
address
START
sector?
Yes
Yes
No
ID
ID
Yes
S71PL129JC0/S71PL129JB0/S71PL129JA0
PLSCNT = 1
A d v a n c e
Reset
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 Unprotect
I n f o r m a t i o n
from RESET#
Device failed
Remove V
Write reset
Increment
command
PLSCNT
PLSCNT
complete
= 1000?
Yes
No
Sector Unprotect
ID
Algorithm
No
No
Write 60h to sector
Set up first sector
Sector Unprotect:
Unprotect: Write
Sector Unprotect
RESET# = V
sector address
40h to sector
from RESET#
Verify Sector
address with
with A7-A0 =
Cycle = 60h?
PLSCNT = 1
address with
Remove V
Wait 1.2 ms
Data = 00h?
Write reset
Read from
First Write
Last sector
01000010
00000010
00000010
command
Wait 4 μs
All sectors
protected?
complete
A7-A0 =
A7-A0 =
address
verified?
START
Yes
Yes
Yes
Yes
S71PL129Jxx_00_A8 October 28, 2005
ID
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up