參數(shù)資料
型號(hào)： L033MU01RI
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)： 18/61頁(yè)
文件大?。?/td> 772K
代理商： L033MU01RI
16
Am29LV033MU
September 12, 2006
D A T A S H E E T
Sector Group Protection and
Unprotection
The hardware sector group protection feature disables
both program and erase operations in any sector
group. In this device, a sector group consists of four
adjacent sectors that are protected or unprotected at
the same time (see Table 4). The hardware sector
group unprotection feature re-enables both program
and erase operations in previously protected sector
groups. Sector group protection/unprotection can be
implemented via two methods.
Sector protection/unprotection requires V
ID
on the RE-
SET# pin only, and can be implemented either in-sys-
tem or via programming equipment. Figure 2 shows
the algorithms and Figure 24 shows the timing dia-
gram. This method uses standard microprocessor bus
cycle timing. For sector group unprotect, all unpro-
tected sector groups must first be protected prior to
the first sector group unprotect write cycle.
The device is shipped with all sector groups unpro-
tected. AMD offers the option of programming and pro-
tecting sector groups at its factory prior to shipping the
device through AMD’s ExpressFlash Service. Con-
tact an AMD representative for details.
It is possible to determine whether a sector group is
protected or unprotected. See the
Autoselect Mode
section for details.
Table 4.
Sector Group Protection/Unprotection
Address Table
Note:
All sector groups are 256 Kbytes in size.
Sector Group
A22–A18
SA0–SA3
00000
SA4–SA7
00001
SA8–SA11
00010
SA12–SA15
00011
SA16–SA19
00100
SA20–SA23
00101
SA24–SA27
00110
SA28–SA31
00111
SA32–SA35
01000
SA36–SA39
01001
SA40–SA43
01010
SA44–SA47
01011
SA48–SA51
01100
SA52–SA55
01101
SA56–SA59
01110
SA60–SA63
01111
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