AM29LV641GH53R SPANSION [SPANSION], AM29LV641GH53R Datasheet - Page 21
![no-image](/images/no-image-200.jpg)
AM29LV641GH53R
Manufacturer Part Number
AM29LV641GH53R
Description
64 Megabit (4 M x 16-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/O Control
Manufacturer
SPANSION [SPANSION]
Datasheet
1.AM29LV641GH53R.pdf
(55 pages)
- Current page: 21 of 55
- Download datasheet (2Mb)
June 14, 2005
Sector Group
Temporary Sector
Group Unprotect
Algorithm
Device failed
Protect
Increment
PLSCNT
PLSCNT
Mode
= 25?
No
Yes
No
No
Sector Group Protect:
address twith A6 = 0,
sector group address
Verify Sector Group
group address with
Figure 2. In-System Sector Group Protect/Unprotect Algorithms
Write 60h to sector
Protect: Write 40h
Protect complete
A6 = 0, A1 = 1,
to sector group
RESET# = V
group address
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Sector Group
from RESET#
Set up sector
sector group?
PLSCNT = 1
Cycle = 60h?
Remove V
with A6 = 0,
Wait 150 µs
Data = 01h?
Write reset
Read from
First Write
command
Wait 1 μs
START
another
Protect
A0 = 0
No
Yes
Yes
ID
ID
A D V A N C E
Yes
PLSCNT = 1
Reset
Am29LV641G
I N F O R M A T I O N
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
address with A6 = 1,
Verify Sector Group
40h to sector group
Unprotect complete
Write 60h to sector
group address with
Set up first sector
Unprotect: Write
A6 = 1, A1 = 1,
A6 = 1, A1 = 1,
RESET# = V
group address
Sector Group
A1 = 1, A0 = 0
from RESET#
Sector Group
address with
sector group
PLSCNT = 1
Cycle = 60h?
Remove V
Data = 00h?
Write reset
Wait 15 ms
Read from
Last sector
First Write
protected?
Unprotect:
command
Wait 1 μs
All sector
verified?
START
groups
A0 = 0
A0 = 0
group
Yes
Yes
Yes
Yes
ID
ID
No
No
next sector group
Temporary Sector
Group Unprotect
address
Set up
Mode
22
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