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V
CC
44
V
SS
22
RAM ADDR
REGISTER
B
REGISTER
32
PSEN
33
ALE/PROG
TIMING
35
AND
EAV
CONTROL
PP
10
RST
PD
OSCILLA TOR
21
20
XTAL1
XTAL2
Program Enable
Chip Enable
Output Enable
Address inputs
(2..12,23,25...30)
Program Supply
Program/Erase
Supply Voltage
LCD02TC
First issue 11 / 04
U19 (Digital Board 13/16) - 80C32P
P0.0–P0.7
43
PORT 0
DRIVERS
PORT 0
RAM
LATCH
ACC
TMP2
ALU
PSW
PORT 1
LATCH
PORT 1
DRIVERS
2
9
P1.0–P1.7
U23 (Digital Board 13/16) - W27C020
31
PGM
22
CE
CONTROL
24
OE
A0
DECODER
A17
32
Vcc
16
Ground
GND
1
Vpp
P2.0–P2.7
24
31
36
PORT 2
DRIVERS
PORT 2
LATCH
STACK
POINTER
TMP1
SFRs
TIMERS
PORT 3
LATCH
PORT 3
DRIVERS
11
P3.0–P3.7
13
DQ0
OUTPUT
BUFFER
DQ7
25
CORE
ARRAY
89
ROM/EPROM
8
PROGRAM
ADDRESS
REGISTER
BUFFER
PC
INCRE-
MENTER
8
PROGRAM
COUNTER
DPTR'S
MULTIPLE
19
Data Inputs/Outputs
16
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