Aiwa AV-D35 Service Manual page 31

IC DESCRIPTION
IC, UPD780228GF
Pin No. Pin Name I/O
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1 K-SCAN O Scan output to diode input (Active "L").
2 O-PLL-CE O Tuner PLL chip enable output.
3 O-DATA (M) O Sound CTRL, PLL, DOLBY PROLOGIC or DSP, AC-3 VOL, GEQ. Data output.
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4 TUNE/IFC I Tuner TUNE/IFC detection input.
5 O-STB (M) O Sound CTRL, KEYCON strobe output.
6 O-MUTE O System mute ON/OFF output.
7 O-CLK (M) O Sound CTRL, PLL, DOLBY PROLOGIC or DSP, AC-3 VOL, GEQ. Clock output.
8 O-OSD (CE) O OSD chip enable output.
9 /I-SYNC-DET O System power supply. ON/OFF output.
10 O-PRO-CE/O-DSP-CE O DOLBY PROLOGIC or DSP chip enable output.
11 — — Not used.
12 TM-BASE I Reference clock input for watch.
13 — O IC101. Strobe output from shift register (1).
14-16 — — Not used.
17 IC — GND.
18 VSS — GND.
19 VDD — Power supply pin.
20, 21 — — Not used.
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22 CS O DOLBY digital (AC-3) control. CS output.
23 SCK O DOLBY digital (AC-3) control. Clock output.
24 SI O DOLBY digital (AC-3) control. Data output.
25 SO I DOLBY digital (AC-3) control. Data input.
26 SDA I CODEC IC (CS4226) control. Data output.
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27 ADO/CS O CODEC IC (CS4226) control. CS output.
28 I-RDS-CLK I RDS clock input (external interrupt).
29 I-RDS-DATA I RDS data input.
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30 RESET — Reset.
31 O-CONT.1 O Master VOL control output for SL/SR.
Master VOL control output for center/SUB-woofer (TRIM control output for center/
32 O-CONT.2 O
SUB-woofer).
33 OSD-CLK O OSD clock output.
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34 I-RMC I Remote control input.
35 OSD-DATA O OSD data output.
36 C-SHIFT O Microprocessor clock shift output (Active "H").
37 VDD1 — Power supply pin.
38 X1 — Connected to 5.76MHz oscillator.
39 X2 — Connected to 5.76MHz oscillator.
40 VSS1 — GND.
41 AVDD — Power supply pin.
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42 HOLD I System power supply voltage monitoring. AD input.
43 I-RE-VOL I Rotary encoder (VOL). AD input.
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Description
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Pin No. Pin Name I/O
44 I-SYNC-DET/I-RDS-SIG I OSD sync. AD input. RDS tuning signal level. AD input.
45 I-JOG2 I Rotary encoder (JOG2). AD input.
46 I-FU-JOG1 I Function selector rotary encoder (JOG1). AD input.
47, 48 I-KEY2, I-KEY1 I Key 2, 1. AD input.
49 I-MIC I Microphone signal level detector. AD input.
50 AVSS — ADND.
51 O-STB-31 O GEQ IC chip enable output.
52 POWER-LED O Power LED ON/OFF output (Active "H").
53-64 P35-P24 O FL segment output (P35-P24).
65 P23/I-AM10K O FL segment output (P23)/supporting AM step initialization 10 kHz.
66, 67 P22/I-VF.KC.EC I/O FL segment output (P22, P21)/supporting VF, key control, ECHO. Diode input.
68 P20/I-AC3 I/O FL segment output (P20)/supporting AC-3. Diode input.
69-73 P19-O-P15 O FL segment output (P19-P15).
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74 P14/I-STEREO I/O FL segment output (P14). Turner/stereo detection input (stereo at "L").
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75 P13/I-HPMUTE I/O FL segment output (P13). Headphones insertion detection input (HP insertion at "L").
76-78 P12-P10 O FL segment output (P12-P10).
79 VDD2 — Power supply pin.
80 -VFL — – Voltage.
81-89 P9-P1 O FL segment output (P9-P1).
90-100 G11-G1 O FL grid output (G11-G1).
Description
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