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| 型號(hào)： | AM29LV640DH101RZIN |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | PROM |
| 英文描述： | 64 Megabit (4 M x 16-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileI Control |
| 中文描述： | 4M X 16 FLASH 3V PROM, 100 ns, PDSO56 |
| 封裝： | MO-180BA, SSOP-56 |
| 文件頁數(shù)： | 21/57頁 |
| 文件大?。?/td> | 1467K |
| 代理商： | AM29LV640DH101RZIN |
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20
Am29LV640D/Am29LV641D
September 20, 2002
Figure 2.
In-System Sector Group Protect/Unprotect Algorithms
Sector Group Protect:
Write 60h to sector
group address with
A6 = 0, A1 = 1,
A0 = 0
Set up sector
group address
Wait 150 μs
Verify Sector Group
Protect: Write 40h
to sector group
address twith A6 = 0,
A1 = 1, A0 = 0
Read from
sector group address
with A6 = 0,
A1 = 1, A0 = 0
START
PLSCNT = 1
RESET# = V
ID
Wait 1
μ
s
First Write
Cycle = 60h
Data = 01h
Remove V
from RESET#
Write reset
command
Sector Group
Protect complete
Yes
Yes
No
PLSCNT
= 25
Yes
Device failed
Increment
PLSCNT
Temporary Sector
Group Unprotect
Mode
No
Sector Group
Unprotect:
Write 60h to sector
group address with
A6 = 1, A1 = 1,
A0 = 0
Set up first sector
group address
Wait 15 ms
Verify Sector Group
Unprotect: Write
40h to sector group
address with
A6 = 1, A1 = 1,
A0 = 0
Read from
sector group
address with A6 = 1,
A1 = 1, A0 = 0
START
PLSCNT = 1
RESET# = V
ID
Wait 1
μ
s
Data = 00h
Last sector
group
verified
Remove V
from RESET#
Write reset
command
Sector Group
Unprotect complete
Yes
No
PLSCNT
= 1000
Yes
Device failed
Increment
PLSCNT
Temporary Sector
Group Unprotect
Mode
No
All sector
groups
protected
Yes
Protect all sector
groups:
The indicated
portion of the sector
group protect algorithm
must be performed for all
unprotected sector
groups prior to issuing
the first sector group
unprotect address
Set up
next sector group
address
No
Yes
No
Yes
No
No
Yes
No
Sector Group
Protect
Algorithm
Sector Group
Unprotect
Algorithm
First Write
Cycle = 60h
Protect
another
sector group
Reset
PLSCNT = 1
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