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参数资料
| 型号： | AM29F400BT-90EE |
| 厂商： | ADVANCED MICRO DEVICES INC |
| 元件分类： | PROM |
| 英文描述： | 4 Megabit (512 K x 8-Bit/256 K x 16-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
| 中文描述： | 256K X 16 FLASH 5V PROM, 90 ns, PDSO48 |
| 封装： | MO-142DD, TSOP-48 |
| 文件页数： | 13/43页 |
| 文件大小： | 548K |
| 代理商： | AM29F400BT-90EE |
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November1,2006 21505E5
Am29F400B
11
D A T A S H E E T
Table 4.
Am29F400B Autoselect Codes (High Voltage Method)
L = Logic Low = V
IL
, H = Logic High = V
IH
, SA = Sector Address, X = Don’t care.
Sector Protection/Unprotection
The hardware sector protection feature disables both
program and erase operations in any sector. The hard-
ware sector unprotection feature re-enables both
program and erase operations in previously protected
sectors.
Sector protection/unprotection must be implemented
using programming equipment. The procedure
requires a high voltage (V
ID
) on address pin A9 and
OE#. Details on this method are provided in a supple-
ment, publication number 20185. Contact an AMD
representative to obtain a copy of this document.
The device is shipped with all sectors unprotected.
AMD offers the option of programming and protecting
sectors 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 is protected
or unprotected. See “Autoselect Mode” for details.
Temporary Sector Unprotect
This feature allows temporary unprotection of previ-
ously protected sectors to change data in-system. The
Sector Unprotect mode is activated by setting the
RESET# pin to V
ID
. During this mode, formerly pro-
tected sectors can be programmed or erased by
selecting the sector addresses. Once V
ID
is removed
from the RESET# pin, all the previously protected
sectors are protected again. Figure 1 shows the algo-
rithm, and Figure 18 shows the timing diagrams, for this
feature.
Figure 1.
Temporary Sector Unprotect Operation
Description
Mode
CE#
OE#
WE#
A17
to
A12
A11
to
A10
A9
A8
to
A7
A6
A5
to
A2
A1
A0
DQ8
to
DQ15
DQ7
to
DQ0
Manufacturer ID
:
AMD
L
L
H
X
X
V
ID
X
L
X
L
L
X
01h
Device ID:
Am29F400B
(Top Boot Block)
Word
L
L
H
X
X
V
ID
X
L
X
L
H
22h
23h
Byte
L
L
H
X
23h
Device ID:
Am29F400B
(Bottom Boot Block)
Word
L
L
H
X
X
V
ID
X
L
X
L
H
22h
ABh
Byte
L
L
H
X
ABh
Sector Protection Verification
L
L
H
SA
X
V
ID
X
L
X
H
L
X
01h
(protected)
X
00h
(unprotected)
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.
相关PDF资料 |
PDF描述 |
|---|---|
| AM29F400BT-90EE0 | 4 Megabit (512 K x 8-Bit/256 K x 16-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
| AM29F400BT-90EF | 4 Megabit (512 K x 8-Bit/256 K x 16-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
| AM29F400BT-90EF0 | 4 Megabit (512 K x 8-Bit/256 K x 16-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
| AM29F400BT-90EI | 4 Megabit (512 K x 8-Bit/256 K x 16-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
| AM29F400BT-90EI0 | 4 Megabit (512 K x 8-Bit/256 K x 16-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AM29F400BT-90EF | 功能描述:闪存 4M (512KX8/256Kx16) Parallel NOR Fl 5V RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| AM29F400BT-90EI\T | 制造商:Advanced Micro Devices 功能描述:Flash Mem Parallel 5V 4M-Bit 512K x 8/256K x 16 90ns 48-Pin TSOP T/R |
| AM29F400BT-90SE\T | 制造商:Spansion 功能描述:4 MEGABIT (512 K X 8-BIT/256 K X 16-BIT) CMOS 5.0 VOLT-ONLY BOOT SECTOR FLASH MEMORY |
| AM29F400BT-90SF\\T | 制造商:Spansion 功能描述:NOR Flash Parallel 5V 4Mbit 512K/256K x 8bit/16bit 90ns 44-Pin SO T/R |
| AM29F400BT-90SF\T | 制造商:Spansion 功能描述:NOR Flash Parallel 5V 4Mbit 512K/256K x 8bit/16bit 90ns 44-Pin SO T/R |
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