AM29PDL128G70 SPANSION [SPANSION], AM29PDL128G70 Datasheet - Page 28
AM29PDL128G70
Manufacturer Part Number
AM29PDL128G70
Description
128 Megabit (8 M x 16-Bit/4 M x 32-Bit) CMOS 3.0 Volt-only, Simultaneous Read/ Write Flash Memory with VersatileIO Control
Manufacturer
SPANSION [SPANSION]
Datasheet
1.AM29PDL128G70.pdf
(69 pages)
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Note:These algorithms are valid only in Persistent Sector Protection mode. They are not valid in Password Protection Mode.
July 29, 2002
Sector Protect
Temporary Sector
Unprotect Mode
Algorithm
Device failed
Increment
PLSCNT
PLSCNT
= 25?
No
Yes
No
No
Write 60h to sector
Protect: Write 40h
to sector address
Protect another
Sector Protect:
sector address
RESET# = V
Sector Protect
from RESET#
Set up sector
Verify Sector
with A6-A0 =
with A6-A0 =
Cycle = 60h?
Remove V
PLSCNT = 1
address with
Data = 01h?
Wait 150 µs
Write reset
Read from
First Write
command
Wait 1 s
complete
A6-A0 =
0111010
0111010
0111010
address
START
sector?
Yes
Yes
No
ID
ID
Figure 1. In-System Sector Protection/
Yes
Sector Unprotection Algorithms
PLSCNT = 1
P R E L I M I N A R Y
Reset
Am29PDL128G
The indicated portion
Protect all sectors:
unprotected sectors
of the sector protect
prior to issuing the
unprotect address
algorithm must be
performed for all
Sector Unprotect
first sector
Algorithm
Device failed
Increment
PLSCNT
PLSCNT
= 1000?
Yes
No
No
No
Write 60h to sector
Set up first sector
Sector Unprotect:
Unprotect: Write
Sector Unprotect
sector address
RESET# = V
40h to sector
from RESET#
Verify Sector
address with
with A6-A0 =
Cycle = 60h?
PLSCNT = 1
address with
Remove V
Data = 00h?
Write reset
Wait 15 ms
Read from
First Write
Last sector
command
Wait 1 s
All sectors
protected?
complete
A6-A0 =
1111010
A6-A0 =
1111010
1111010
address
verified?
START
Yes
Yes
Yes
Yes
ID
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up
27
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