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TMS28F008AST Datasheet(PDF) 17 Page - Texas Instruments

Part # TMS28F008AST
Description  AUTO-SELECT BOOT-BLOCK FLASH MEMORIES
PDF  52 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TMS28F008AST Datasheet(HTML) 17 Page - Texas Instruments

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TMS28F008Axy,TMS28F800Axy
1048576 BY 8BIT/524288 BY 16BIT
AUTOSELECT BOOT BLOCK FLASH MEMORIES
SMJS851A − NOVEMBER 1997 − REVISED MARCH 1998
17
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
byte-wide or word-wide mode selection (continued)
Table 8. Operation Modes for Byte-Wide Mode (’28F008Axy) (see Note 2)
MODE
WP
CE
OE
RP
WE
A9
A0
VPP
DQ0 − DQ7
Read
X
VIL
VIL
VIH
VIH
X
X
X
Data out
X
VIL
VIL
VIH
VIH
VID
VIL
X
Manufacturer-equivalent code
89h
Algorithm-selection mode
X
VIL
VIL
VIH
VIH
VID
VIH
X
Device-equivalent code 98
(top boot block)
X
VIL
VIL
VIH
VIH
VID
VIH
X
Device-equivalent code 99
(bottom boot block)
Output disable
X
VIL
VIH
VIH
VIH
X
X
X
Hi-Z
Standby
X
VIH
X
VIH
X
X
X
X
Hi-Z
Reset / deep power down
X
X
X
VIL
X
X
X
X
Hi-Z
Write (see Note 3)
VIL or
VIH
VIL
VIH
VIH or
VHH
VIL
X
X
VPPL or
VPPH
Data in
NOTES:
2. X = don’t care
3. When writing commands to the ’28F008Axy and the ’28F800Axy, VPP must be in the appropriate VPP voltage range (as shown in
the recommended operating conditions table for a specific product) for block-erase or program commands to be executed. Also,
depending on the combination of RP and WP, the boot block can be secured and, therefore, is not programmable (see Table 2 for
a list of the combinations).



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