參數(shù)資料
型號： AM29F080B-90FCB
廠商： ADVANCED MICRO DEVICES INC
元件分類： PROM
英文描述： 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
中文描述： 1M X 8 FLASH 5V PROM, 90 ns, PDSO40
封裝： REVERSE, TSOP-40
文件頁數(shù)： 10/37頁
文件大?。?/td> 451K
代理商： AM29F080B-90FCB
10
Am29F080B
P R E L I M I N A R Y
Table 3.
Am29F080B Autoselect Codes (High Voltage Method)
Legend:
L = Logic Low = V
IL
, H = Logic High = V
IH
, SGA = Sector Group Address, X = Don’t care.
Note:
The system may also autoselect information in-system via the command register. See Table 5.
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 4 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 4.
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
Description
CE#
OE#
WE#
A19
to
A12
A11
to
A10
A9
A8
to
A7
A6
A5
to
A2
A1
A0
DQ7
to
DQ0
Manufacturer ID
:
AMD
L
L
H
X
X
V
ID
X
L
X
L
L
01h
Device ID: Am29F080B
L
L
H
X
X
V
ID
X
L
X
L
H
D5h
Sector Group
Protection Verification
L
L
H
SGA
X
V
ID
X
L
X
H
L
01h (protected)
00h
(unprotected)
Sector
Group
SGA0
A19
0
A18
0
A17
0
Sectors
SA0
–
SA1
SA2
–
SA3
SA4
–
SA5
SA6
–
SA7
SA8
–
SA9
SA10
–
SA11
SA12
–
SA13
SA14
–
SA15
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.
21503C-6
相關PDF資料
PDF描述
AM29F080B-75FCB 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F080B-75FIB 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F080B-120EC 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F080B-120ECB 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F080B-120EI 8 Megabit (1 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
相關代理商/技術參數(shù)
參數(shù)描述
AM29F080B-90SD 制造商:Spansion 功能描述:IC SM FLASH 5V 8MB
AM29F080B-90SD 制造商:Spansion 功能描述:FLASH 8MB SMD 29F080 SOIC44
AM29F080B-90SF 制造商:Spansion 功能描述: 制造商:Spansion 功能描述:IC, FLASH MEM, 8MBIT, 90NS, 44-SOIC, Memory Type:Flash - NOR, Memory Size:8Mbit,
AM29F080B-90SI 制造商:Advanced Micro Devices 功能描述:
AM29F100B120EC 制造商:AMD 功能描述:*
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*