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AT87F52 Datasheet(PDF) 13 Page - ATMEL Corporation

Part # AT87F52
Description  8-Bit Microcontroller with 8K Bytes QuickFlash
PDF  22 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT87F52 Datasheet(HTML) 13 Page - ATMEL Corporation

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AT87F52
13
Programming Interface
Every code byte in the QuickFlash array can be pro-
grammed by using the appropriate combination of control
signals. The write operation cycle is self-timed and once
initiated, will automatically time itself to completion.
All major programming vendors offer worldwide support for
the Atmel microcontroller series. Please contact your local
programming vendor for the appropriate software revision.
QuickFlash Programming Modes
Mode
RST
PSEN
ALE/PROG
EA/VPP
P2.6
P2.7
P3.6
P3.7
Write Code Data
H
L
12V
L
H
H
H
Read Code Data
H
L
H
H
L
L
H
H
Write Lock
Bit - 1
H
L
12V
H
H
H
H
Bit - 2
H
L
12V
H
H
L
L
Bit - 3
H
L
12V
H
L
H
L
Read Signature Byte
H
L
H
H
L
L
L
L



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