Aiwa AV-DV75 Service Manual page 28

IC DESCRIPTION
IC, UPD780228GF
Pin No. Pin Name
________________
1 K-SCAN
2 O-PLL-CE
3 O-DATA (M)
__________________
4 TUNE/IFC
5 O-STB (M)
6 O-MUTE
7 O-CLK (M)
8 O-OSD (CE)
9 /I-SYNC-DET
10 O-PRO-CE/O-DSP-CE
11 —
12 TM-BASE
13 —
14-16 —
17 IC
18 VSS
19 VDD
20, 21 —
______
22 CS
23 SCK
24 SI
25 SO
26 SDA
______________
27 ADO/CS
28 I-RDS-CLK
29 I-RDS-DATA
_____________
30 RESET
31 O-CONT.1
32 O-CONT.2
33 OSD-CLK
___________
34 I-RMC
35 OSD-DATA
36 C-SHIFT
37 VDD1
38 X1
39 X2
40 VSS1
41 AVDD
____________
42 HOLD
43 I-RE-VOL
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I/O
O Scan output to diode input (Active "L").
O Tuner PLL chip enable output.
O Sound CTRL, PLL, DOLBY PROLOGIC or DSP, AC-3 VOL, GEQ. Data output.
__________________
I Tuner TUNE/IFC detection input.
O Sound CTRL, KEYCON strobe output.
________
O System mute ON/OFF output.
O Sound CTRL, PLL, DOLBY PROLOGIC or DSP, AC-3 VOL, GEQ. Clock output.
O OSD chip enable output.
_____
O System power supply. ON/OFF output.
O DOLBY PROLOGIC or DSP chip enable output.
— Not used.
I Reference clock input for watch.
O IC101. Strobe output from shift register (1).
— Not used.
— GND.
— GND.
— Power supply pin.
— Not used.
O DOLBY digital (AC-3) control. CS output.
O DOLBY digital (AC-3) control. Clock output.
O DOLBY digital (AC-3) control. Data output.
I DOLBY digital (AC-3) control. Data input.
I CODEC IC (CS4226) control. Data output.
O CODEC IC (CS4226) control. CS output.
I RDS clock input (external interrupt).
I RDS data input.
— Reset.
O Master VOL control output for SL/SR.
Master VOL control output for center/SUB-woofer (TRIM control output for center/
O
SUB-woofer).
O OSD clock output.
I Remote control input.
O OSD data output.
O Microprocessor clock shift output (Active "H").
— Power supply pin.
— Connected to 5.76MHz oscillator.
— Connected to 5.76MHz oscillator.
— GND.
— Power supply pin.
I System power supply voltage monitoring. AD input.
I Rotary encoder (VOL). AD input.
42
Description
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