參數(shù)資料
型號(hào)： AM29F080B-90SF
廠商： Advanced Micro Devices, Inc.
英文描述： 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
中文描述： 8兆位（1米× 8位）的CMOS 5.0伏只，統(tǒng)一部門快閃記憶體
文件頁(yè)數(shù)： 13/39頁(yè)
文件大?。?/td> 517K
代理商： AM29F080B-90SF
November1,2006 21503G5
Am29F080B
11
D AT A S H E E T
Sector Group Protection/Unprotection
The hardware group sector protection feature dis-
ables both program and erase operations in any sec-
tor group. Each sector group consists of two adjacent
sectors. Table 3 shows how the sectors are grouped,
and the address range that each sector group con-
tains. The hardware sector group unprotection fea-
ture re-enables both program and erase operations in
previously protected sector groups.
Sector group protection/unprotection must be imple-
mented using programming equipment. The procedure
requires a high voltage (V
ID
) on address pin A9 and the
control pins. Details on this method are provided in a
supplement, listed in publication number 19945. Con-
tact an AMD representative to obtain a copy of the ap-
propriate document.
The device is shipped with all sectors unprotected.
AMD offers the option of programming and protecting
sector groups at its factory prior to shipping the device
through AMD’s ExpressFlash Service. Contact an
AMD representative for details.
It is possible to determine whether a sector group is
protected or unprotected. See “Autoselect Mode” for
details.
Table 3.
Sector Group Addresses
Temporary Sector Group Unprotect
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,
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
the Temporary Sector Group Unprotect diagram
shows the timing waveforms, for this feature.
Figure 1.
Temporary Sector Group Unprotect
Operation
Sector
Group
A19
A18
A17
Sectors
SA0
–
SA1
SA2
–
SA3
SA4
–
SA5
SA6
–
SA7
SA8
–
SA9
SA10
–
SA11
SA12
–
SA13
SA14
–
SA15
SGA0
0
0
0
SGA1
0
0
1
SGA2
0
1
0
SGA3
0
1
1
SGA4
1
0
0
SGA5
1
0
1
SGA6
1
1
0
SGA7
1
1
1
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.
相關(guān)PDF資料
PDF描述
AM29F080B-90SK 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F080B-120EF 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F080B-120EK 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F080B-120SD 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F080B-120SF 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM29F080B-90SI 制造商:Advanced Micro Devices 功能描述:
AM29F100B120EC 制造商:AMD 功能描述:*
AM29F100B-120EC 制造商:Advanced Micro Devices 功能描述:
AM29F100B120SC 制造商:AMD 功能描述:New
AM29F100B-120SC 制造商:Advanced Micro Devices 功能描述:NOR Flash, 64K x 16, 44 Pin, Plastic, SOP
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