AT89LV51-12AC View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
AT89LV51-12AC Datasheet PDF : 16 Pages
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Programming Interface
Every code byte in the Flash array can be written and the
entire array can be erased by using the appropriate combi-
nation 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.
Flash Programming Modes
Mode
Write Code Data
RST
H
PSEN
L
ALE/PROG
EA/VPP
12V
P2.6
L
P2.7
H
P3.6
H
P3.7
H
Read Code Data
H
L
Write Lock
Bit - 1
H
L
H
H
L
L
H
H
12V
H
H
H
H
Bit - 2
H
L
12V
H
H
L
L
Bit - 3
H
L
12V
H
L
H
L
Chip Erase
H
L
(1)
12V
H
L
L
L
Read Signature Byte
H
L
H
Note: 1. Chip Erase requires a 10-ms PROG pulse.
H
L
L
L
L
Figure 3. Programming the Flash
Figure 4. Verifying the Flash
+5V
AT89LV51
ADDR. A0 - A7 P1
VCC
CC
OOOOH/OFFFH
P2.0 - P2.3 P0
A8 - A11
PGM
DATA
P2.6
SEE FLASH
PROGRAMMING
MODES TABLE
P2.7
ALE
P3.6
P3.7
PROG
XTAL2
EA
VIH/VPP
3-12 MHz
XTAL1
RST
VIH
GND
PSEN
4-51
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