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µ-COM IC PIN ASSIGNMENT & BLOCK DIAGRAM.
PIN ASSIGNMENTS
(TOP VIEW)
(SIS) P97
VKK
(KEY0) P40
(KEY1) P41
(KEY2) P42
(KEY3) P43
(KEY4) P44
(KEY5) P45
(CIN5/KEY6) P46
(CIN4/KEY7) P47
(CIN3) P50
(CIN2) P51
(CIN1) P52
(CIN0) P53
P54
(PWM/PDO) P55
BLOCK
DIAGRAM
I/O Ports
Output Ports
P97
P87
to
to
P90
P80
VDD
P9
P8
Power Supply
VSS
VFT Power
VKK
VFT drive circuit (automatic display)
Supply
P S W
Flags
RBS
ALU
Reset I/O
RESET
System Controller
Test Pin
TEST
Standby Controller
Time Base
Timing Generator
Timer
High
XIN
Resonator
frequ.
XOUT
connecting
Clock
Pins
Generator
Low
Watchdog
frequ.
Timer
P2
P0
P22
P07
to
to
P20
P00
6-5
P66 (G9)
P65 (G10)
P64 (G11)
P63 (G12)
P62 (G13)
P61 (G14)
P60 (G15)
VDD
P07
P06
P05
P04
P03
P02
P01
P00
I/O Ports
P77
P67
to
to
P70
P60
P7
P6
Key scan
control
Program counter
Stack Pointer
Data Memory
(RAM)
Program Memory
Register banks
(ROM)
Interrupt Controller
Inst.
Register
Inst.
16-bit
8-bit
Serial
Decoder
Timer/Counters
Timer/Counters
Interfaces
TC1
TC2
TC3
TC4
SIO
HSO
6-bit A/D
Converter
P1
P3
P5
P4
P17
P37
P55
P47
to
to
to
to
P10
P30
P50
P40
I/O Ports
74CX08 (AND GATE)
Connection Diagram
1
14
Vcc
A0
2
13
B0
A2
12
3
O0
B2
4
11
A1
O2
5
10
B1
A3
9
6
O1
B3
7
8
O3
GND
6-6
Logic Symbol
A0
&
B0
A1
B1
A2
B2
A3
B3
O0
O1
O2
O3
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