49
HCD-DX2D
• IC Pin Function Description
MAIN BOARD IC501 uPD780078 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
MUTE1
O
Muting signal output to the VIDEO AMP (only for AEP, UK, RU models)
2
MUTE2
O
Muting signal output to the VIDEO AMP (only for AEP, UK, RU models)
3
RPHD
O
REC/PLAY control signal output
4
BIAS
O
BIAS ON/OFF control signal output
5
TSOL
O
Tape solenoid control signal output
6
TMOT
O
Tape motor control signal output
7
TCNT
O
Tape control signal output
8
VIDEO SW
I
RGB/COMPONENT select SW signal input (only for AEP, UK, RU models)
9
GND
—
Ground terminal
10
VDD
—
Power supply terminal (+5V)
11
STE
I
Stereo signal input
12
TUCE
O
Chip enable signal output to the tuner
13
VIDS
O
INT/PRO signal output
14
TOP
I
DVD/CD tray open SW signal input
15
VEDA
O
Chip select output to the FL driver
16
VFCK
O
Clock output to the FL driver
17
VFSTB
O
Data output to the FL driver
18
TUDI
O
Data output to the tuner
19
TUDO
I
Data input from the tuner
20
TUCK
O
Clock output to the tuner
21
RDDA
O
Strobe signal output to the tuner
22
VUP
I
Volume up input (VR601)
23
FPON
O
FL power supply control signal output
24
VDD1
—
Power supply terminal (+5V)
25
GND
—
Ground terminal
26
KEY1
I
Function key input
27
KEY2
I
Function key input
28
KEY3
I
Function key input
29
SFTY
I
AC cut detect signal input
I
Tape SW (PACK, HDPLY) signal input
I
Tape SW (RECF, RECR) signal input
I
Destination version setting
I
Volume down input (VR601)
I
Reference voltage terminal
I
DVD/CD tray close SW signal input
I
System reset signal input
I
Subclock input (36.768KHz)
O
Subclock output (36.768KHz)
39
IC
—
Not used
40
X2
I
Main system clock input (8.38MHz)
41
X1
O
Main system clock output (8.38MHz)
42
GND
—
Ground terminal
43
U-SENS
O
USB SENS signal output (not used)
44
INH
I
Power down detect signal input
45
REM
I
SIRES signal input from the remote control receiver
46
RDCK
O
RDCK signal output to the tuner
47
MRST
O
MPEG reset signal output
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