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AM29PDL128G Folha de dados(PDF) 29 Page - Advanced Micro Devices

Nome de Peças AM29PDL128G
Descrição Electrónicos  128 Megabit (8 M x 16-Bit/4 M x 32-Bit) CMOS 3.0 Volt-only, Simultaneous Read/ Write Flash Memory with VersatileIOTM Control
PDF  71 Pages
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Fabricante Electrônico  AMD [Advanced Micro Devices]
Página de início  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM29PDL128G Folha de dados(HTML) 29 Page - Advanced Micro Devices

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Am29PDL128G
October 28, 2004
P R E L IM IN A R Y
Figure 1.
In-System Sector Protection/Sector Unprotection Algorithms
Note:These algorithms are valid only in Persistent Sector Protection mode, and are not valid in Password Protection Mode.
Sector Protect:
Write 60h to sector
address with
A6-A0 =
0111010
Set up sector
address
Wait 150 µs
Verify Sector
Protect: Write 40h
to sector address
with A6-A0 =
0111010
Read from
sector address
with A6-A0 =
0111010
START
PLSCNT = 1
RESET# = VID
Wait 1
µs
First Write
Cycle = 60h?
Data = 01h?
Remove VID
from RESET#
Write reset
command
Sector Protect
complete
Yes
Yes
No
PLSCNT
= 25?
Yes
Device failed
Increment
PLSCNT
Temporary Sector
Unprotect Mode
No
Sector Unprotect:
Write 60h to sector
address with
A6-A0 =
1111010
Set up first sector
address
Wait 15 ms
Verify Sector
Unprotect: Write
40h to sector
address with
A6-A0 =
1111010
Read from
sector address
with A6-A0 =
1111010
START
PLSCNT = 1
RESET# = VID
Wait 1
µs
Data = 00h?
Last sector
verified?
Remove VID
from RESET#
Write reset
command
Sector Unprotect
complete
Yes
No
PLSCNT
= 1000?
Yes
Device failed
Increment
PLSCNT
Temporary Sector
Unprotect Mode
No
All sectors
protected?
Yes
Protect all sectors:
The indicated portion
of the sector protect
algorithm must be
performed for all
unprotected sectors
prior to issuing the
first sector
unprotect address
Set up
next sector
address
No
Yes
No
Yes
No
No
Yes
No
Sector Protect
Algorithm
Sector Unprotect
Algorithm
First Write
Cycle = 60h?
Protect another
sector?
Reset
PLSCNT = 1



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