參數(shù)資料
型號(hào): S29GL032M10FBCR50
廠商: Spansion Inc.
英文描述: MirrorBit Flash Family
中文描述: MirrorBit閃存系列
文件頁數(shù): 95/159頁
文件大小: 2217K
代理商: S29GL032M10FBCR50
Octorber 18, 2004 S29GLxxxM_00_B3
S29GLxxxM MirrorBit
TM
Flash Family
95
D a t a s h e e t
Temporary Sector Group Unprotect
This feature allows temporary unprotection of previously protected sector groups to change data in-system. The
Sector Group Unprotect mode is activated by setting the RESET# pin to
V
ID
. During this mode, formerly 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, on page 135
shows the timing diagrams, for this feature.
Notes:
1. All protected sector groups unprotected (If WP# = V
IL
, the highest or lowest address sector remains protected for
uniform sector devices, the top or bottom two address sectors remains protected for boot sector devices).
2. All previously protected sector groups are protected once again.
Figure 1. Temporary Sector Group Unprotect Operation
SA492–SA495
SA496–SA499
SA500–SA503
SA504–SA507
SA508
SA509
SA510
SA511
1111011xx
1111100xx
1111101xx
1111110xx
111111100
111111101
111111110
111111111
Table 30. S29GL256M Sector Group Protection/Unprotection Address Table (Sheet 4 of 4)
Sector Group
A23–A15
START
Perform Erase or
Program Operations
RESET# = V
IH
Temporary Sector
Group Unprotect Completed
(Note 2)
RESET# = V
ID
(Note 1)
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