參數(shù)資料
型號(hào)： L652DU90RI
廠商： Advanced Micro Devices, Inc.
英文描述： 128 Megabit (16 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO⑩ Control
中文描述： 128兆位（16米× 8位）的CMOS 3.0伏特，只有統(tǒng)一部門閃存與VersatileIO⑩控制記憶
文件頁(yè)數(shù)： 23/54頁(yè)
文件大?。?/td> 492K
代理商： L652DU90RI
May 5, 2006 24961A5
Am29LV652D
21
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 5, on page 20
)).
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 RESET# to V
ID
(8.5 V – 12.5 V). During this
mode, formerly protected sector groups can be pro-
grammed or erased by selecting the sector group ad-
dresses. Once V
ID
is removed from RESET#, all the
previously protected sector groups are
protected again.
Figure 1, on page 21
shows the algo-
rithm, and
Figure 21, on page 46
shows the timing dia-
grams, 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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