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TMS29F400B Datasheet(PDF) 2 Page - Texas Instruments

Part No. TMS29F400B
Description  524288 BY 8-BIT/262144 BY 16-BIT FLASH MEMORIES
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TMS29F400B Datasheet(HTML) 2 Page - Texas Instruments

 
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TMS29F400T, TMS29F400B
524288 BY 8-BIT/262144 BY 16-BIT
FLASH MEMORIES
SMJS843A – MAY 1997 – REVISED SEPTEMBER 1997
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
44-PIN PSOP
DBJ PACKAGE
(TOP VIEW)
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NC
RY/BY
A17
A7
A6
A5
A4
A3
A2
A1
A0
CE
VSS
OE
DQ0
DQ8
DQ1
DQ9
DQ2
DQ10
DQ3
DQ11
RESET
WE
A8
A9
A10
A11
A12
A13
A14
A15
A16
BYTE
VSS
DQ15/A–1
DQ7
DQ14
DQ6
DQ13
DQ5
DQ12
DQ4
VCC
description
The TMS29F400T/B is a 524 288 by 8-bit / 262 144 by 16-bit (4 194 304-bit), 5-V single-supply, programmable
read-only memory device that can be electrically erased and reprogrammed. This device is organized as 512K
by 8 bits or 256K by 16 bits, divided into 11 sectors:
One 16K-byte/8K-word boot sector
Two 8K-byte/4K-word sectors
One 32K-byte/16K-word sector
Seven 64K-byte/32K-word sectors
Any combination of sectors can be marked as read-only or erased. Full-chip erasure is also supported.
Sector data protection is afforded by methods that can disable any combination of sectors from write or read
operations using standard programming equipment. An on-chip state machine provides an on-board algorithm
that automatically pre-programs and erases any sector before it automatically programs and verifies program
data at any specified address. The command set is compatible with that of the Joint Electronic Device
Engineering Council (JEDEC) standards and is compatible with the JEDEC 4M-bit electrically erasable,
programmable read-only memory (EEPROM) command set. A suspend/resume feature allows access to
unaltered memory blocks during a section-erase operation. All outputs of this device are TTL-compatible.
Additionally, an erase/suspend/resume feature supports reading data from, or programming data to, a sector
that is not being erased.


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