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4-5. IC PIN FUNCTION DESCRIPTION
•PANEL BOARD IC101 µPD78082GB-A293BSMTX (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Function
1 to 3 — I Not used (fixed at “L”)
4 DESTINATION I Input terminal for the destination setting (fixed at “L”)
5 AC3 VOL I Detection input of the VOLUME (RV204) position “L”: minimum, “H”: maximum
6 — I Not used (fixed at “L”)
7 FUNCTION/C O Function select signal output terminal (C) *1
8 FUNCTION/B O Function select signal output terminal (B) *1
9 FUNCTION/A O Function select signal output terminal (A) *1
10, 11 — I Not used (fixed at “L”)
12 to 15 DATA 0 to
DATA 3 I/O Two-way data bus with the system control bus
16 LED-CLK O Serial data transfer clock signal output to the LED driver (IC102)
17 VSS — Ground terminal
18 LED-DATA O Serial data output to the LED driver (IC102)
19 LED-LATCH O Serial data latch pulse output to the LED driver (IC102)
20 LED-RESET O Reset signal output to the LED driver (IC102) “H”: reset
21 LINE-MUTE O Line muting on/off control signal output terminal “L”: line muting on
22 DIRECT O Source direct function on/off control signal output terminal “H”: source direct on
23 GND — Ground terminal
24 DBFB-SW O DBFB function on/off control signal output terminal “L”: DBFB on
25 DBFB-LEVEL O DBFB sensibility selection signal output terminal “L”: DBFB high, “H”: DBFB low
26 MUTE–20dB O Attenuator control (–20 dB) signal output terminal “L”: attenuate (–20 dB) on
27 VOL-LOUD O Motor control signal output to the volume control motor driver (IC104) “H” active
28 VOL-WEAK O Motor control signal output to the volume control motor driver (IC104) “H” active
29 AC3 O Dolby surround (AC-3) system control output terminal “L” active
30 AC-CUT I AC off detection signal input terminal “L”: AC off
31 Y-BUS-CLK I/O Bus data transfer/reading clock signal in/out terminal for the system control bus
32 Y-BUS-BUSY I/O Busy signal in/out terminal for the system control bus
33 — I Not used (fixed at “L”)
34 GND — Ground terminal
35 RESET I System reset signal input from the reset signal generator (IC103) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
36 GND — Ground terminal
37 X2 O Main system clock output terminal (5 MHz)
38 X1 I Main system clock input terminal (5 MHz)
39 VDD — Power supply terminal (+5V)
40 AVDD — Power supply terminal (+5V) (for A/D converter)
41 AVREF I Reference voltage (+5V) input terminal (for A/D converter)
42 GND — Ground terminal
43 KEY 1 I Key input terminal (A/D input) (S101 and S102) FUNCTION >, FUNCTION .keys input
44 KEY 2 I Key input terminal (A/D input) (S103 to S105)
–20dB MUTING, SOURCE DIRECT, DBFB keys input
*1 Function select control
Function
Terminal
FUNCTION/A (pin 9)“H” “L” “L” “H” “L” “H” “H”
FUNCTION/B (pin 8)“L” “H” “L” “H” “H” “H” “L”
FUNCTION/C (pin 7)“L” “L” “H” “H” “H” “L” “H”
( ): TA-MS717
TUNER CD MD TAPE VIDEO 1
(CS/BS) VIDEO 2
(LD/DVD) VIDEO 3
(VIDEO)
