Microprocessor (Ic306) Port Format - Radio Shack PRO-106 Service Manual

MICROPROCESSOR (IC307) PORT FORMAT
Pin
Number Function
1
Tri-Color LED D/A output
2
Tri-Color LED D/A output
3
High Speed Data input
4
WX Alert input
5
Low Speed Data input
6
BYTE input (GND)
7
CNVSS input (Pull down)
8
NC
9
Voltage Regulator Control
10
Reset input
11
X-Out
12
VSS
13
X-in
14
VCC1
15
NC (Pull up)
16
NC (Pull down)
17
Hold input
18
Alert Tone output
19
LCD RS output
20
Beep Tone output
21
LCD CSB output
22
Beep Tone output
23
LCD SI output
24
LCD SCL output
25
LCD Reset output
26
LCD Back Light output
27
WX Same Data input
28
Key Back Light output
29
PC/IF output
30
PC/IF input
31
NC (Pull down)
32
NC
33
PC/IF output
34
PC/IF input
Pin
Number Function
35
DSP Comms and Pin 12 74LV595A out
36
DSP Comms and Pin 14 74LV595A out
37
DSP Comms output
38
DSP Comms input
39
Boot input
40
DSP Comms and Pin 11 74LV595A out
41
DSP-LD Ready input
42
DSP-LD 9600-Det input
43
DSP-LD ES-Det input/output
44
NC (Pull down)
45
DSP LD output
46
DSP Reset output
47
Keyboard input
48
Keyboard input
49
Keyboard input
50
Keyboard input
51
Keyboard input
52
Keyboard input
53
DSP Sleep output
54
DSP Wake output
55
Keyboard output
56
Keyboard output
57
Keyboard output
58
Keyboard output
59
Keyboard output
60
VCC2
61
Keyboard output
62
VSS
63
DSP-LD RX-DG input
64
External On input
65
Battery Charge output
66
Hiss Reduction output
67
NBFM Audio + 6 dB output
71
Pin
Number Function
68
Power Save output
69
Select DG Audio output
70
PLL Clock output
71
PLL Data output
72
Select FM Audio output
73
EEPROM SDA output
74
PLL LE output
75
PLL LD input
76
Shift Registor CLK output
77
Shift Registor A output
78
Signal Sweeper Control output
79
Signal Sweeper SQ2 input
80
Signal Sweeper Search Control output
81
SQ1 input
82
AM Narrow Filter Select output
83
3rd OSC Control B output
84
Mute output
85
Select AM Audio output
86
3rd OSC Control A output
87
Signal Sweeper Scan Control output
88
Tri-Color LED output
89
Tri-Color LED output
90
Tri-Color LED output
91
Tri-Color LED output
92
Low Battery Voltage A/D input
93
Zeromatic Voltage A/D input
94
AVSS
95
RSSI A/D input
96
V REF
97
AVCC
98
Pocket/Mobile Select input
99
NC (Pull up)
100
EEPROM SCL output