at87f52-20qi ATMEL Corporation, at87f52-20qi Datasheet - Page 13

• Manufacturer Part Number: at87f52-20qi
• Description: At87f52 8-bit Microcontroller With 8k Bytes Quickflash
• Manufacturer: ATMEL Corporation

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.
QuickFlash Programming Modes
Mode
Write Code Data
Read Code Data
Write Lock
Read Signature Byte
Bit - 1
Bit - 2
Bit - 3
RST
H
H
H
H
H
H
PSEN
L
L
L
L
L
L
ALE/PROG
H
H
All major programming vendors offer worldwide support for
the Atmel microcontroller series. Please contact your local
programming vendor for the appropriate software revision.
EA/V
12V
12V
12V
12V
H
H
PP
P2.6
H
H
H
L
L
L
P2.7
H
H
H
L
L
L
P3.6
H
H
H
H
L
L
P3.7
H
H
H
L
L
L
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