AM41LV3204MB10IT AMD [Advanced Micro Devices], AM41LV3204MB10IT Datasheet - Page 21
![no-image](/images/no-image-200.jpg)
AM41LV3204MB10IT
Manufacturer Part Number
AM41LV3204MB10IT
Description
Stacked Multi-chip Package (MCP) 32 Mbit (4 M x 8 bit/2 M x 16-bit) Flash Memory and 4 Mbit (512K x 8-Bit/256 K x 16-Bit) Static RAM
Manufacturer
AMD [Advanced Micro Devices]
Datasheet
1.AM41LV3204MB10IT.pdf
(67 pages)
- Current page: 21 of 67
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20
Sector Group
Temporary Sector
Group Unprotect
Algorithm
Device failed
Protect
Increment
PLSCNT
PLSCNT
Mode
= 25?
No
Yes
No
No
Figure 2. In-System Sector Group Protect/Unprotect Algorithms
Sector Group Protect:
sector group address
Verify Sector Group
Write 60h to sector
group address with
Protect: Write 40h
A6–A0 = 0xx0010
A6–A0 = 0xx0010
Protect complete
to sector group
RESET# = V
group address
from RESET#
Sector Group
Set up sector
address with
sector group?
Cycle = 60h?
Remove V
PLSCNT = 1
Wait 150 µs
with A6–A0
Data = 01h?
Write reset
Read from
First Write
= 0xx0010
command
Wait 1 s
START
another
Protect
No
Yes
Yes
ID
ID
Yes
P R E L I M I N A R Y
PLSCNT = 1
Reset
Am41LV3204M
must be performed for all
group protect algorithm
groups: The indicated
groups prior to issuing
the first sector group
portion of the sector
unprotected sector
Protect all sector
unprotect address
Sector Group
Unprotect
Algorithm
Device failed
Increment
PLSCNT
PLSCNT
= 1000?
No
Yes
No
No
Verify Sector Group
40h to sector group
Unprotect complete
Write 60h to sector
group address with
Set up first sector
A6–A0 = 1xx0010
A6–A0 = 1xx0010
A6–A0 = 1xx0010
Unprotect: Write
RESET# = V
group address
Sector Group
from RESET#
Sector Group
address with
address with
Cycle = 60h?
sector group
Remove V
PLSCNT = 1
Data = 00h?
Write reset
Wait 15 ms
Read from
Last sector
First Write
protected?
Unprotect:
command
Wait 1 s
All sector
verified?
START
groups
group
Yes
Yes
Yes
Yes
ID
ID
No
No
next sector group
Temporary Sector
Group Unprotect
June 10, 2003
address
Set up
Mode
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