Microprocessor (Ic1) Port Format - Radio Shack PRO-60 Service Manual

MICROPROCESSOR (IC1) PORT fORMAT
65
80
40
25
Pin No.
Function
Pin No. Function
1 LCD segment driveroutput
41 GND
2
LCD segment driveroutput
42
Key input
3 LCD segment driver output 43 Key input
4 LCD segment driveroutput 44 Key input
5
LCD segment driveroutput
45 Key input
6
LCD segment driver output
46
Keyoutput
7 LCD segment driveroutput 47
Keyoutput
8
LCD segment driveroutput
48
AM/FMIWFM output
9
LCD segment driveroutput
49
Peep output
10 LCD segment driveroutput 50 Keyoutput
11
LCD segment driveroutput
51 Keyoutput
12
LCD segment driveroutput
52
Keyoutput
13 LCD segment driveroutput 53
Key output
14
NC
54
VDD
15
NC
55
+B
16
NC
56
NC
17 Memory serial data output
57 NC
18
Memory chip select
58 Resonator connection terminal
19
Memory chip select
59
Resonator
conneetion
terminal
20
Memory serial data clock 60 Backlight output
21 LCD common driver output 61 Power control
22
LCD common driver output
62
Mute output
23
LCD common driver output 63
Zerornatic
control
24
LCD common driver output 64 Zeromatic input
25
LCD bias control 65 Squelch input
26 LCD drive power supply 66 low battery input
27
LCD drive power supply
67
Memory data input
28
lCD drive power supply
68
HOlD input
29
WFM output
69 lCD segment driver output
30
Band 5 output
70
lCD segment driver output
31
Band 4 output
71
LCD segment driver output
32
Band 3 output
72
LCD segment driver output
33 Vss 73
lCD segment driver output
34 Band 2 output
74
lCD segment driver output
35
Band 1 output
75
lCD segment driver output
36 PLllatch 1 output 76 lCD segment driver output
37
PLL latch 2 output
n
LCD segment driver output
38 Key input 78 LCD segment driver output
39
PLL serial
clock
output
79
LCD segment driver output
40
PLL
serlat
data output 80 LCD segment driver output
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