Diagrams; Explanation Of Ic Terminal - Sony ICF-C723 Service Manual

4-1. EXPLANATION OF IC TERMINALS
IC101 µ PD17071GB-522-1A7 (SYSTEM CONTROL)
Pin No. Pin name
1 INIT
2 PLAY OUT VOL
3 POWER
4 R MUTE
5 PLAY
6 – 9 KS0 – 3
10 – 13 KS0 – 3
14 BAND 1
15 BAND 2
16 VAMP
17 REC
18 GND
19 EO
20 VCOL
21 VCOH
22 VREG 1
23 VDD
24 X OUT
25 X IN
26 VREG 2
27 VLCD 0
28 CAP 0
29 CAP 1
30 LCD 1
31 – 34 COM 0 – 3
35 – 48 LCD 0 – 13
49 LCD14
50 CF
51 INT
52 BEEP
53 EON IN
54 PB 1
55 PB 2
56 PB 3
SECTION 4

DIAGRAMS

I/O
O Destination select terminal.
– Not used (Open).
O Mute drive output.
O REC Mute drive output.
O Voice memo play control output.
I Key input.
I Key input.
O FM/AM band select.
O MW/LW band select.
I MIC input.
O Voice memo REC control output.
– Ground.
O Tuning voltage control output.
I VCO (MF, HF) input terminal.
I VCO (VHF) input terminal.
– Capacitor connect terminal.
– Power supply.
O System clock output (75MHz).
I System clock input (75MHz).
– Capacitor connect terminal.
I LCD drive device voltage input.
– Capacitor connect terminal.
– Capacitor connect terminal.
I LCD drive device voltage input.
O LCD common output.
O LCD segment output.
– Not used (Open).
I Chip enable input.
– Not used (Fixed at "L").
O Beep signal output.
I REC signal input.
I Destination select terminal.
I Destination select terminal.
I Destination select terminal.
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Description