– 7 –
Pin No. Pin name I/O Description
1 DO — Not used (OPEN).
2 EEPROM CS — Not used (OPEN).
3 TV 4-12CH — Not used (OPEN).
4 MUTE O Audio mute signal output.
5 NC — Not used (Connect to ground).
6 POWER O Power ON/OFF control output.
7 KS0 O Key source signal output. *1
8 KS1 O Key source signal output. *1
9 KS2 O Key source signal output. *1
10 KS3 O Key source signal output. *1
11 KR0 I Key return signal input.
12 NC — Not used (Connect to ground).
13 KR1 I Key return signal input. *1
14 KR2 I Key return signal input. *1
15 KR3 I Key return signal input. *1
16 METER O Meter drive signal output (Not used : OPEN).
17 ST/MONO O Stereo/ Mono control signal output.
18 V DET2 I Voltage decrease detection input. “L” : less than 2.1V (Change to clock mode).
19 BAND O Band select output. “H” : AM, “L” : FM
20 GND — Ground terminal.
21 GND — Ground terminal.
22 EO O PLL error signal output for PLL LPF.
23 VCOL I VCO input.
24 VCOH — Not used (OPEN).
25 REG0 — Capacitor connection terminal for LCD drive voltage.
26 VDD — Power supply terminal (3V).
27 VDD — Power supply terminal (3V).
28 X OUT O System clock output (75kHz).
29 X IN I System clock input (75kHz).
30 REG1 — Capacitor connection terminal for LCD drive voltage.
31 LEG LCD0 — Capacitor connection terminal for LCD drive voltage.
32 CAP LCD0 — Capacitor connection terminal for LCD drive voltage.
33 CAP2 LCD1 — Capacitor connection terminal for LCD drive voltage.
34 LEG LCD1 — Capacitor connection terminal for LCD drive voltage.
35 COM0 O Common signal output for LCD.
36 COM1 O Common signal output for LCD.
37 COM2 O Common signal output for LCD.
38 NC — Not used (Connect to ground).
39 COM3 O Common signal output for LCD.
40 LCD0 O Segment signal output for LCD.
41 LCD1 O Segment signal output for LCD.
42 LCD2 O Segment signal output for LCD.
43 LCD3 O Segment signal output for LCD.
44 LCD4 O Segment signal output for LCD.
45 NC — Not used (Connect to ground).
SECTION 4
DIAGRAMS
4-1. EXPLANATION OF ICTERMINALS
IC502 µPD17073GB-925-9EU (SYSTEM CONTROL, LCD DRIVE)
