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IC DESCRIPTION
IC, µPD178018AGC–554–3B9
Pin No.
Pin Name
1
FM/AM S-M
2
LEVEL IND
3
A-VOL CONT
4
CD CONNECT
5
CD DISP SEL
6
CD CLO
7
CD DI
8
CD DO
9
CD CLI
10
LCD CE
11
CLK SEL
12
LCD DI
13
LCD DO
14
LCD CLO
15
CD ACC CONT
16
POWER MUTE
17
ST-BY MUTE
18
POWER CONT
19
CONT1
20
CONT2
21
GND
22
VDD
23
MUTE
24
BAND CONT
25
RADIO CONT
26
RDS MODE
27
IF REQ
28
AM IF
29
FM IF
30
VDD PLL
31
FM OSC
32
AM OSC
33
GND PLL
34
EO0
35
EO1
36
GND
37
LOC/DX
38
SD/ST IND
39
PHONE MUTE
40
CDS CS
I/O
I
Input RDS AF IN signal and FM/AM S meter signal.
I
Input level indicator signal.
I
Detect mic input and operate auto volume. (Not used)
I
Connectivity check to CD changer.
O
Communication timing signal output to CD changer ("H" = TX, "L" = RX).
O
Output synchronous clock signal for sending to CD changer.
I
Input data signal for receiving from CD changer.
O
Output data signal for sending to CD changer.
I
Input synchronous clock signal for receiving from CD changer.
O
LCD driver (LC75854W) : Output CE signal.
O
CLock selection for CDS and LCD driver (LC75854W) ("H" = CDS, "L" = LCD).
I/O
LCD driver (LC75854W) : Input data signal.
O
LCD driver (LC75854W) : Output data signal.
O
LCD driver (LC75854W) : Output synchronous clock signal.
O
Output CD changer ACC signal.
O
Output POWER MUTE signal.
O
Output STANDBY MUTE signal.
O
Output POWER CONTROL signal.
O
LCD driver contrast controller 1.
O
LCD driver contrast controller 2.
–
GND.
–
Power supply.
O
Output audio mute.
O
Output AM/FM power supply switching ("H" = AM, "L" = FM).
O
Output radio power switching ("L" = Radio mode).
O
Output "H" when RDS AF mode. (Not used)
O
Output request for IF count signal.
I
Input AM IF count signal.
I
Input FM IF count signal.
–
Power supply for PLL.
I
Input FM local oscillation.
I
Input AM local oscillation.
–
Connected to GND for PLL.
O
Output error from charge pump. (Not used)
O
Output error from charge pump.
–
GND.
O
Output LOC/DX switching when seeking radio broadcast ("H" = LOC, "L" = DX).
Input stereo signal. Enable when receiving FM broadcast ("H" = MONO, "L" = ST)/
I
Input FM/AM broadcast detection signal when seeking ("H" = Detect broadcast).
I
External mute control.
O
CDS : Output CS signal.
Description
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