AM29DL323GB90EI AMD (ADVANCED MICRO DEVICES), AM29DL323GB90EI Datasheet - Page 22

• Manufacturer Part Number: AM29DL323GB90EI
• Description: Flash Memory IC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM29DL323GB90EI

• Memory Configuration: 4M X 8 / 2M X 16 Bit
• Supply Voltage Max: 3.6V
• Access Time, Tacc: 90nS
• Mounting Type: Surface Mount
• Supply Voltage: 3V

20
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
A6 = 0, A1 = 1,
Protect another
Sector Protect:
sector address
RESET# = V
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Sector Protect
from RESET#
Set up sector
Verify Sector
Cycle = 60h?
PLSCNT = 1
address with
with A6 = 0,
with A6 = 0,
Remove V
Wait 150 µs
Data = 01h?
Write reset
Read from
First Write
command
Wait 1 μs
complete
address
START
sector?
A0 = 0
Yes
No
Yes
ID
ID
Figure 2. In-System Sector Protection/
Yes
Sector Unprotection Algorithms
PLSCNT = 1
Reset
D A T A
Am29DL32xG
The indicated portion
Protect all sectors:
unprotected sectors
of the sector protect
prior to issuing the
unprotect address
algorithm must be
performed for all
S H E E T
Sector Unprotect
first sector
Algorithm
Device failed
Increment
PLSCNT
PLSCNT
= 1000?
Yes
No
No
No
Set up first sector
Sector Unprotect:
Unprotect: Write
Sector Unprotect
Write 60h to any
A6 = 1, A1 = 1,
A6 = 1, A1 = 1,
RESET# = V
sector address
A1 = 1, A0 = 0
from RESET#
Verify Sector
40h to sector
address with
PLSCNT = 1
Cycle = 60h?
address with
Remove V
with A6 = 1,
Data = 00h?
Write reset
Wait 15 ms
Read from
First Write
Last sector
protected?
command
Wait 1 μs
All sectors
complete
verified?
address
START
A0 = 0
A0 = 0
25686B10 December 4, 2006
Yes
Yes
Yes
Yes
ID
ID
No
No
Temporary Sector
Unprotect Mode
next sector
address
Set up