參數(shù)資料
型號(hào): AM29LV033C-120WDK
廠商: Advanced Micro Devices, Inc.
英文描述: 32 Megabit (4 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory
中文描述: 32兆位(4個(gè)M × 8位)的CMOS 3.0伏特,只有統(tǒng)一部門閃存
文件頁(yè)數(shù): 16/49頁(yè)
文件大?。?/td> 693K
代理商: AM29LV033C-120WDK
14
Am29LV033C
22268B5 September 12, 2006
D A T A S H E E T
Table 4.
Sector Block Addresses for
Protection/Unprotection
Temporary Sector/Sector Block Unprotect
(Note: For the following discussion, the term “sector”
applies to both sectors and sector blocks. A sector
block consists of two or more adjacent sectors that are
protected or unprotected at the same time (see
Table 4, on page 16
).
This feature allows temporary unprotection of previ-
ously protected sectors to change data in-system. The
Sector Unprotect mode is activated by setting the RE-
SET# pin to V
ID
. During this mode, formerly protected
sectors can be programmed or erased by selecting the
sector addresses. Once V
ID
is removed from the RE-
SET# pin, all the previously protected sectors are
protected again.
Figure 1, on page 16
shows the algo-
rithm, and
Figure 21, on page 40
shows the timing dia-
grams, for this feature.
Figure 1.
Temporary Sector Unprotect Operation
Sector/
Sector Block
A21–A16
Sector/
Sector Block Size
SA0
000000
64 Kbytes
SA1-SA3
000001,000010,
000011
192 (3x64) Kbytes
SA4-SA7
000100, 000101,
000110, 000111
256 (4x64) Kbytes
SA8-SA11
001000, 001001,
001010, 001011
256 (4x64) Kbytes
SA12-SA15
001100, 001101,
001110, 001111
256 (4x64) Kbytes
SA16-SA19
010000, 010001,
010010, 010011
256 (4x64) Kbytes
SA20-SA23
010100, 010101,
010110, 010111
256 (4x64) Kbytes
SA24-SA27
011000, 011001,
011010, 011011
256 (4x64) Kbytes
SA28-SA31
011100, 011101,
011110, 011111
256 (4x64) Kbytes
SA32-SA35
100000, 100001,
100010, 100011
256 (4x64) Kbytes
SA36-SA39
100100, 100101,
100110, 100111
256 (4x64) Kbytes
SA40-SA43
101000, 101001,
101010, 101011
256 (4x64) Kbytes
SA44-SA47
101100, 101101,
101110, 101111
256 (4x64) Kbytes
SA48-SA51
110000, 110001,
110010, 110011
256 (4x64) Kbytes
SA52-SA55
110100, 110101,
110110, 110111
256 (4x64) Kbytes
SA56-SA59
111000, 111001,
111010, 111011
256 (4x64) Kbytes
SA60-SA62
111100, 111101,
111110
192 (4x64) Kbytes
SA63
111111
64 Kbytes
START
Perform Erase or
Program Operations
RESET# = V
IH
Temporary Sector
Unprotect Completed
(Note 2)
RESET# = V
ID
(Note 1)
Notes:
1. All protected sectors unprotected.
2. All previously protected sectors are protected once
again.
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