30
HCD-DF1
• IC Pin Function Description
MAIN BOARD U1 3P70F4XZZ-S094 (SYSTEM CONTROLLER)
Pin No.
Pin Name I/O Description
1
VSS - Ground terminal
2
XOUT O System clock output terminal (4.19 MHz)
3
XIN I System clock input terminal (4.19 MHz)
4
TEST I Test signal input terminal Not used
5
REMOTE I SIRCS signal input from the remote control receiver
6
DVD_STB
/TU_DO
I
Strobe signal input from the DVD block
Serial data input from the tuner (FM/AM)
7
RESET I
System reset signal input terminal "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
8
NC - Not used
9
DVD_CLK
/TU_CLK
I/O
Strobe signal input from the DVD block
Serial data transfer clock signal output to the tuner (FM/AM)
10
DVD_IR/TU_DI I/O
Interrupt request signal input from the DVD block
Serial data output to the tuner (FM/AM)
11
DVD_DATA
/TU_CE
I/O
Serial data input from the DVD block
Chip enable signal output to the tuner (FM/AM)
12
PROTECT I Protect signal input terminal
13 to 15
KEY_IN0 to
KEY_IN2
I Front panel key input terminal (A/D input)
16
KEY_OUT I Wake up signal input terminal
17
OPTION_IN O System clock signal output to the liquid crystal display
18
BU9728_CLK O Serial data transfer clock signal output to the liquid crystal display
19
NC - Not used
20
BU9728_CE O Chip enable signal output to the liquid crystal display
21
BU9728_DATA O Serial data output to the liquid crystal display
22
BU9728_C/D_STB
O Command strobe signal output to the liquid crystal display
23
MUTE O Muting on/off control signal output terminal "L": muting on
24
TU_VCC_CTRL O Power on/off control signal output terminal "L": power on
25
POWER_CTRL O Power on/off control signal output terminal for main power "L": power on
26
24C01_CLK
/7314_CLK
I Serial data transfer clock signal output to the electrical volume and EEPROM
27
24C01_DATA
/7314_DATA
I/O
Serial data output to the electrical volume
Two-way data bus with the EEPROM
28
DVD_VCC_CTRL
O Power on/off control signal output terminal for DVD block "H": power on
29
OP/CL I DVD lid open/close detection signal input terminal "L": DVD lid is closed
30
STAND_BY O LED drive signal output terminal for STANDBY indicator "H": LED on
31
OUT2
O
Fan motor drive signal output terminal Not used
32
VDD - Power supply terminal (+3.3V)