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IC DESCRIPTION

IC, µPD178006AGC–540–3B9

Pin No. Pin Name I/O Description

1 FM/AM S-M I Input RDS AF IN signal and FM/AM S meter signal.

2 LEVEL IND I Input level indicator signal.

3 A-VOL CONT I Detect mic input and operate auto volume. (Not used)

4 CD CONNECT I Connectivity check to CD changer.

5 CD DISP SEL O Communication timing signal output to CD changer ("H" = TX, "L" = RX).

6 CD CLO O Output synchronous clock signal for sending to CD changer.

7 CD DI I Input data signal for receiving from CD changer.

8 CD DO O Output data signal for sending to CD changer.

9 CD CLI I Input synchronous clock signal for receiving from CD changer.

10 LCD CE O LCD driver (LC75854W) : Output CE signal.

11 CLK SEL O CLock selection for CDS and LCD driver (LC75854W) ("H" = CDS, "L" = LCD).

12 LCD DI I/O LCD driver (LC75854W) : Input data signal.

13 LCD DO O LCD driver (LC75854W) : Output data signal.

14 LCD CLO O LCD driver (LC75854W) : Output synchronous clock signal.

15 CD ACC CONT O Output CD changer ACC signal.

16 POWER MUTE O Output POWER MUTE signal.

17 ST-BY MUTE O Output STANDBY MUTE signal.

18 POWER CONT O Output POWER CONTROL signal.

19 CONT1 O LCD driver contrast controller 1.

20 CONT2 O LCD driver contrast controller 2.

21 GND – GND.

22 VDD – Power supply.

23 MUTE O Output audio mute.

24 BAND CONT O Output AM/FM power supply switching ("H" = AM, "L" = FM).

25 RADIO CONT O Output radio power switching ("L" = Radio mode).

26 RDS MODE O Output "H" when RDS AF mode. (Not used)

27 IF REQ O Output request for IF count signal.

28 AM IF I Input AM IF count signal.

29 FM IF I Input FM IF count signal.

30 VDD PLL – Power supply for PLL.

31 FM OSC I Input FM local oscillation.

32 AM OSC I Input AM local oscillation.

33 GND PLL – Connected to GND for PLL.

34 EO0 O Output error from charge pump. (Not used)

35 EO1 O Output error from charge pump.

36 GND – GND.

37 LOC/DX O Output LOC/DX switching when seeking radio broadcast ("H" = LOC, "L" = DX).

38 SD/ST IND I

Input stereo signal. Enable when receiving FM broadcast ("H" = MONO, "L" = ST)/

Input FM/AM broadcast detection signal when seeking ("H" = Detect broadcast).

39 PHONE MUTE I External mute control.

40 CDS CS O CDS : Output CS signal.

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