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參數(shù)資料
| 型號： | AM29LV033MUU112FI |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | 32 Megabit (4 M x 8-Bit) MirrorBit 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/O Control |
| 中文描述： | 32兆位（4個M × 8位）的MirrorBit 3.0伏特，只有統(tǒng)一閃存部門與VersatileI / O控制 |
| 文件頁數(shù)： | 17/56頁 |
| 文件大?。?/td> | 1138K |
| 代理商： | AM29LV033MUU112FI |
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November 11, 2002
Am29LV033MU
17
A D V A N C E I N F O R M A T I O N
Temporary Sector Group Unprotect
(
Note:
In this device, a sector group consists of four adjacent
sectors that are protected or unprotected at the same time
(see Table 4).
This feature allows temporary unprotection of previ-
ously protected sector groups to change data in-sys-
tem. The Sector Group Unprotect mode is activated by
setting the RESET# pin to
V
ID
. During this mode, for-
merly protected sector groups can be programmed or
erased by selecting the sector group addresses. Once
V
ID
is removed from the RESET# pin, all the previ-
ously protected sector groups are protected again.
Figure 1 shows the algorithm, and Figure 23 shows
the timing diagrams, for this feature.
Figure 1.
Temporary Sector Group
Unprotect Operation
START
Perform Erase or
Program Operations
RESET# = V
IH
Temporary Sector
Group Unprotect
Completed (Note 2)
RESET# = V
ID
(Note 1)
Notes:
1. All protected sector groups unprotected.
2. All previously protected sector groups are protected
once again.
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