參數(shù)資料
型號(hào)： LV320MH
廠商： Spansion Inc.
英文描述： 32 Megabit (4 M x 8-Bit) MirrorBit⑩ 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/O⑩ Control
中文描述： 32兆位（4個(gè)M × 8位）的MirrorBit⑩3.0伏特，只有統(tǒng)一部門閃存記憶體與VersatileI /輸出⑩控制
文件頁(yè)數(shù)： 19/61頁(yè)
文件大?。?/td> 772K
代理商： LV320MH
September 12, 2006
Am29LV033MU
17
D A T A S H E E T
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 previously
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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