AM29PDL310G73WHIN SPANSION [SPANSION], AM29PDL310G73WHIN Datasheet - Page 22

• Manufacturer Part Number: AM29PDL310G73WHIN
• Description: 64 Megabit (4 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Read/Write Flash Memory with Enhanced VersatileIO Control
• Manufacturer: SPANSION [SPANSION]

Note:These algorithms are valid only in Persistent Sector Protection Mode. They are not valid in Password Protection Mode.
February 26, 2003
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
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 A6-A0 =
Cycle = 60h?
PLSCNT = 1
address with
with A6-A0 =
Remove V
Wait 100 µs
Data = 01h?
Write reset
Read from
First Write
command
Wait 4 µs
complete
A6-A0 =
0111010
0000010
address
0000010
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
Am29PDL640G
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
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
40h to sector
from RESET#
Verify Sector
address with
with A6-A0 =
Cycle = 60h?
Remove V
PLSCNT = 1
address with
Data = 00h?
Wait 1.2 ms
Write reset
Read from
First Write
Last sector
command
Wait 4 µs
All sectors
protected?
complete
A6-A0 =
1111010
A6-A0 =
0000010
0000010
address
verified?
START
Yes
Yes
Yes
Yes
ID
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up
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