44
HCD-CPX1
6-19.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC401 M30622MGN-B08FP (SYSTEM CONTROLLER (CD MECHANISM CONTROL))
Pin No.
Pin Name
I/O
Description
1
LCD ON
O
Power on/off control signal output for liquid crystal display “H”: power on
2
RDS DATA
I
Serial data input from the RDS decoder Not used
3
LCD CD
O
Signal output for discriminating between command and display data to the liquid crystal display
driver “L”: display data, “H”: command
4
SIRCS IN/WAKE
I
Remote control signal input terminal
5
LCD DATA
O
Serial data output to the liquid crystal display driver
6
LCD CS
O
Chip select signal output to the liquid crystal display driver “L” active
7
LCD CLK
O
Serial data transfer clock signal output to the liquid crystal display driver
8
BYTE
—
Not used
9
CNVSS
—
Ground terminal
10
XCIN
I
Sub system clock input terminal (32.768 kHz)
11
XCOUT
O
Sub system clock output terminal (32.768 kHz)
12
RESET
I
System reset signal input from the reset signal generator “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
13
XOUT
O
Main system clock output terminal (16 MHz)
14
VSS
—
Ground terminal
15
XIN
I
Main system clock input terminal (16 MHz)
16
VCC
—
Power supply terminal (+3.3V)
17
NMI
I
Non-maskable interrupt input terminal Not used
18
RDS CLK
I
Serial data transfer clock signal input from the RDS decoder Not used
19
CD SCOR
I
Subcode sync (S0+S1) detection signal input from the digital signal processor
20
AC CUT
I
AC off detection signal input from the reset signal generator “L”: AC cut checked
21
ST MUTE
O
Tuner muting on/off control signal output to the tuner unit “H”: muting on
22
ST CE
O
PLL chip enable signal output to the tuner unit
23
ST DATA OUT
O
PLL serial data output to the tuner unit
24
CD PWM3
O
RFDC PWM signal output to the RF amplifier
25
ST DATA IN
I
PLL serial data input from the tuner unit
26
CD PWM2
O
PWM signal output to the RF amplifier
27
ST CLK
O
PLL serial data transfer clock signal output to the tuner unit
28
CD PWM1
O
Focus servo drive PWM signal output to the RF amplifier
29
IIC CLK
I/O
Communication data transfer clock signal input/output terminal Not used
30
IIC DATA
I/O
Communication data bus terminal Not used
31
NO USE
—
Not used
32
CD SQSO
I
Subcode Q data input from the digital signal processor
33
CD SQCLK
O
Subcode Q data reading clock signal output to the digital signal processor
34
ST STEREO
I
FM stereo detection signal input from the tuner unit “L”: stereo
35
CD DATA
O
Serial data output to the digital signal processor
36
CD XLT
O
Serial data latch pulse signal output to the digital signal processor
37
CD CLK
O
Serial data transfer clock signal output to the digital signal processor
38
TC PLAY SW
I
Head position detect switch input terminal
39
32K OUT
O
Clock (32.768 kHz) signal output terminal Not used
40
TC LINE MUTE
O
Line muting on/off control signal output to the recording/playback equalizer amplifier
“H”: muting on
41
TC REC/MUTE
O
Recording muting on/off control signal output to the recording/playback equalizer amplifier
“L”: muting on
42
TC BIAS-ON
O
Recording bias on/off control signal output terminal “H”: bias on
43
TC PB/REC
O
Recording/playback selection signal output terminal “L”: playback, “H”: recording
