s71pl129ja0 Meet Spansion Inc., s71pl129ja0 Datasheet - Page 38

• Manufacturer Part Number: s71pl129ja0
• Description: Stacked Multi-chip Product Mcp Flash Memory And Psram 128 Megabit 8m X 16-bit Cmos 3.0 Volt-only Simultaneous Operation, Page Mode Flash Memory With 64/32/16 Megabit 4m/2m/1m X 16-bit Pseudo-static Ram
• Manufacturer: Meet Spansion Inc.

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
Sector Protect:
sector address
Protect another
RESET# = V
Sector Protect
from RESET#
Set up sector
Verify Sector
with A7-A0 =
Cycle = 60h?
with A7-A0 =
PLSCNT = 1
address with
Remove V
Wait 100 µs
Data = 01h?
Write reset
Read from
First Write
00000010
00000010
command
Wait 4 µs
00000010
complete
A7-A0 =
address
START
sector?
Yes
Yes
No
ID
ID
Yes
PLSCNT = 1
A d v a n c e
Reset
S29PL129J for MCP
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
sector address
RESET# = V
from RESET#
Verify Sector
40h to sector
with A7-A0 =
address with
PLSCNT = 1
Cycle = 60h?
address with
Remove V
Wait 1.2 ms
Data = 00h?
Write reset
Read from
Last sector
First Write
01000010
00000010
00000010
protected?
command
Wait 4 µs
All sectors
A7-A0 =
A7-A0 =
complete
address
verified?
START
Yes
Yes
Yes
Yes
ID
S29PL129J_MCP_00_A0 June 4, 2004
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up