64
ICF-DVD57TV
MAIN BOARD IC401
µ
PD789478GC-SR7596A (MAIN SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1, 2
NC
-
Not used
3 to 5
VLC2 to VLC0
-
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
6 to 9
COM0 to COM3
O
Common drive signal output to the liquid crystal display
10 to 25
SEG0 to SEG15
O
Segment drive signal output to the liquid crystal display
26 to 28
NC
-
Not used
29
µ
-COM R DATA
I
Serial data input from the sub system controller
30
OPEN/CLOSE LED
O
LED drive signal output of the OPEN/CLOSE indicator "H": LED on
31
AUX LED
O
LED drive signal output of the AUX indicator "H": LED on
32
TV LED
O
LED drive signal output of the TV indicator "H": LED on
33
µ
-COM S DATA
O
Serial data output to the sub system controller
34
µ
-COM CLOCK
O
Serial data transfer clock signal output to the sub system controller
35
TUNER LED
O
LED drive signal output of the RADIO ON/BAND indicator "H": LED on
36
XRESET
O
System reset signal output to the sub system controller
37
µ
-COM LATCH
O
Latch signal output to the sub system controller
38
AVDD
-
Power supply terminal (+3.3V) (for A/D converter)
39
DVD OPEN
I
Disc tray open detect switch input terminal "H": disc tray is opend
40, 41
,
ENCODE-
I
Jog dial pulse input from the rotary encoder
42
DVD CLOSE
I
Disc tray close detect switch input terminal "L": disc tray is closed
43 to 46
KEY3 to KEY0
I
Front panel key input terminal (A/D input)
47
AVSS
-
Ground terminal (for A/D converter)
48
RC
I
SIRCS signal input from the remote control receiver
49
AC IN
I
Power failure detection signal input terminal
50
DVDXIFBUSY
O
Busy signal output to the servo DSP
51
LOADING A
O
Disc tray open/close motor drive signal (close direction) output terminal
52
BUZZER
I
Beep sound drive signal output terminal
53
DVD SI0
I
Serial data input from the servo DSP
54
DVD SO0
O
Serial data output to the servo DSP
55
DVD SCK
I
Serial data transfer clock signal input from the servo DSP
56
DVD XIFCS
I
Chip select signal input from the servo DSP
57
DVD AMUT IN
I
Audio muting on/off control signal input from the servo DSP
58
DVD RST
O
Reset signal output to the servo DSP
59
DVD LED
O
LED drive signal output of the DVD indicator "H": LED on
60
LOADING B
O
Disc tray open/close motor drive signal (open direction) output terminal
61
TRAY DET
O
Disc tray open/close detection signal output to the servo DSP "L": disc tray is closed
62
MONITOR ON
O
Power on/off control signal output for the monitor section "H": power on
63
RADIO MUTE
O
Radio muting on/off control signal output to the FM/AM PLL "L": muting on
64
RADIO CE
O
PLL chip enable signal output to the FM/AM PLL
65
RADIO DATA
O
PLL serial data output to the FM/AM PLL
66
RADIO CLK
O
PLL serial data transfer clock signal output to the FM/AM PLL
67
VOL CLK
O
Serial data transfer clock signal output to the electrical volume
68
VOL DAT
O
Serial data output to the electrical volume
69
IC0
-
Not used
70
XT1
I
Sub system clock input terminal (32.768 kHz)
71
XT2
O
Sub system clock output terminal (32.768 kHz)
