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参数资料
| 型号： | A28F400BX-T |
| 厂商： | Intel Corp. |
| 英文描述： | 4-MBIT 256K x16, 512K x8 BOOT BLOCK FLASH MEMORY FAMILY |
| 中文描述： | 的4 - Mbit 256K x16插槽，启动块为512k x8闪存系列 |
| 文件页数： | 9/36页 |
| 文件大小： | 457K |
| 代理商： | A28F400BX-T |
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E
A28F400BR-T/B
9
ADVANCE INFORMATION
Table 1. 28F400 Pin Descriptions
(Continued)
Symbol
Type
Name and Function
WP#
INPUT
WRITE PROTECT:
Provides a method for unlocking the boot block in a
system without a 12V supply.
When WP# is at logic low, the boot block is locked
, preventing
program and erase operations to the boot block. If a program or erase
operation is attempted on the boot block when WP# is low, the
corresponding status bit (bit 4 for program, bit 5 for erase) will be set in
the Status Register to indicate the operation failed.
When WP# is at logic high, the boot block is unlocked
and can be
programmed or erased.
NOTE:
This feature is overridden and the boot block unlocked when RP#
is at V
HH
. See Section 3.4 for details on write protection.
BYTE#
INPUT
BYTE# ENABLE:
Controls whether the device operates in the byte-wide
(x8) mode or the word (x16) mode. The BYTE# input must be controlled
at CMOS levels to meet the CMOS current specification in the standby
mode.
When BYTE# is at logic low, the byte-wide mode is enabled. A 19-bit
address is applied on A
–1
to
A
17
, and 8 bits of data is read and written on
DQ
0
–
DQ
7
.
When BYTE# is at logic high, the word-wide mode is enable. An 18-bit
address is applied on A
0
to A
17
and 16 bits of data is read and written on
DQ
0
–DQ
15
.
V
CC
DEVICE POWER SUPPLY:
5.0V
±
10%
V
PP
PROGRAM/ERASE POWER SUPPLY:
For erasing memory array blocks
or programming data in each block, a voltage either of 5V
±
10% or 12V
±
5% must be applied to this pin. When V
PP
< V
PPLK
all blocks are locked
and protected against Program and Erase commands.
GND
GROUND:
For all internal circuitry.
NC
NO CONNECT:
Pin may be driven or left floating.
2.0
PRODUCT DESCRIPTION
2.1
Memory Blocking Organization
This product family features an asymmetrically-
blocked architecture enhancing system memory
integration.
Each
block
independently. The block sizes have been chosen
to
optimize
their
functionality
applications of nonvolatile storage. For the address
locations of the blocks, see the memory maps in
Figure 3.
can
be
erased
for
common
2.1.1
ONE 16-KB BOOT BLOCK
The boot block is intended to replace a dedicated
boot PROM in a microprocessor or microcontroller-
based system. The 16-Kbyte (16,384 bytes) boot
block is located at either the top (denoted by -T
suffix) or the bottom (-B suffix) of the address map
to accommodate different microprocessor protocols
for boot code location. This boot block features
hardware controllable write protection to protect the
crucial microprocessor boot code from accidental
erasure. The protection of the boot block is
controlled using a combination of the V
PP
, RP#, and
WP# pins, as is detailed in
Table
8.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A28F400BX-T/B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:A28F400BX-T/B |
| A28F5501S | 制造商:General Electric Company 功能描述:OIL FILLED CAPACITOR |
| A28F5502 | 制造商:General Electric Company 功能描述:Film Capacitor |
| A28F5502S | 制造商:General Electric Company 功能描述:CAPACITOR PP FILM 0.5UF 1KV 10% CASE 制造商:GE 功能描述:CAPACITOR PP FILM 0.5UF, 1KV, 10%, CASE 制造商:General Electric Company 功能描述:CAPACITOR PP FILM 0.5UF, 1KV, 10%, CASE; Capacitance:0.5F; Capacitance Tolerance: 10%; Capacitor Dielectric Type:Polypropylene (PP); Voltage Rating:1000V; Life Time @ Temperature:40000 hours @ 70C; Capacitor Case Style:CAN 制造商:General Electric Company 功能描述:OIL FILLED CAPACITOR |
| A28F5503 | 制造商:General Electric Company 功能描述:Film Capacitor |
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