Realistic PRO-2022 - Microprocessor Port Format; Microprocessor Pinout

MICROPROCESSOR (IC7) PORT FORMAT
P,n
Pin
No.
NO .
1
100\lalize signaI input
43
LCD segment driver output
2
NC
44
LCD segment driver output
3
+B
45
LCD segment driver output
4
Vss
46
LCD segment driver output
5 Resonator eenneenon terminal
47
LCD segment driver output
6
Resonator conneenon terminal
48 LCD segment dnver output
7
von
49 LCD segment driver output
8 NC
50 LCD segment
cnver output
9
Peep output
51 LCD segment driver output
10
BAND 6 output
52
LCD segment driver output
11
BAND 5 output
53 LCD segment driver output
12 BAND 4 output
54
LCD segment driver output
13 9AND 3 output
55
LCD segment cnver output
14
BAND 2 or BAND 1
output
56
LCD segment driver output
15
PrescaIer sw
itch
57
LCD segment driver outout
16
SQue!ch
input
58 LCD segment driver output
17
Ze:omatic mout
59 LCD segment driver output
18
v.e
fT'c ry R /W outn ut
60 LCD segment driver output
19
'Aemory CE output
61
LCD segment
drover output
20 Memory
1/0 1
62
LCD segment driver output
21 Memory
1/0 2
63 LCD segment driver output
22
Memory
1/0 3
64
LCD segment drover output
23
Memory
1/0 4
65 LCD segment driver output
24
Memory address AO
66 LCD segment driver output
25
Memory address
Al
67
LCD segment driver output
26
Memory acerees A2
68 NC
27 Memory address A3
69
NC
28
Memory address A4
70 NC
29
Memory address A5
71
LCD bias control
30
Memory address A6
72
PLL raten output
31
I
Memory adcress A7
73
Mute output
32
I
Memory adcress A8
74 Power control
33
Memory address A9
75
Key input
34
I
Memory address AlO
76 Key input
35
' Memory OE output
77 Band switc h
36
LCD drive power supply
78
Serial ciocx output
37
LCD drive power supply
79 Low battery input
38
LCD drive power supply
80
Serial data output
39
LCD common driver outpu t
81
Key input
40 LCD common driver output
82
HaLO input
41
LCD common driver outpu t
83
+8
42 LCD common driver outpu t
84
Timino outpu t
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