31
HCD-EP707
5-15.
IC PIN FUNCTION DESCRIPTION
•
DISPLAY BOARD IC101
µ
PD780206GF-127-3BA (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
VDD3
—
Power supply terminal (+4.2V)
2
POWER
O
Power on/off control signal output terminal “L”: standby, “H”: power on
3
MUTE
O
Muting on/off control signal output terminal “H”: active
4
PLL-CE
O
PLL chip enable signal output to the FM/AM PLL “H” active
5
SOUND ENABLE
O
Sound enable signal output terminal Not used
6
PRO-LOGIC-
ENABLE
O
Pro logic enable signal output terminal Not used
7
DAW M–
O
Drawer motor drive signal output terminal “L”: active
8
STROBE
O
Strobe signal output for the function select IC
9
CD-RESET
O
Reset signal output to the CD block “L”: reset
10
RESET
I
Reset signal input from the reset switch “L”: reset
11
X2
O
System clock output terminal (4.19MHz)
12
X1
I
System clock input terminal (4.19MHz)
13
IC (VPP)
—
Connected to granud
14, 15
NC
—
Not used
16
VDD2
—
Power supply terminal (+4.2V)
17
CLK
O
Serial data transfer clock signal output to the function select IC
18
DATA OUT
O
Serial data output to the function select IC
19
DATA IN
I
Serial data input from the FM/AM PLL
20
CAR M+
O
Carriage motor drive signal output terminal “L”: active
21
CAR M–
O
Carriage motor drive signal output terminal “L”: active
22
EEPROM CLK
O
Serial data transfer clock signal output to the EEPROM and input select IC
23
EEPROM DATA
I/O
Two-way data bus with the EEPROM and input select IC
24
DAW M+
O
Drawer motor drive signal output terminal “L”: active
25
AVSS
—
Ground terminal (for A/D converter)
26
RDS DATAIN
I
RDS serial data input terminal Not used
27
TUNER STATION
I
Tuning detection signal input from the LA1823 “L”: tuned, “H”: detuned
28
AMS
I
Automatic music sensor detection signal input terminal
29
KEY5
I
Key input terminal (A/D input)
30
KEY4
I
Key input terminal (A/D input) Not used
31 to 33
KEY3 to KEY1
I
Key input terminal (A/D input)
34
AVDD
—
Power supply terminal (for A/D converter) (+4.2V)
35
AVREF
I
Reference voltage (+4.4V) input terminal (for A/D converter)
36
CD CLK
O
Serial data transfer clock signal output to the CD block
37
RDS CLKIN
I
RDS serial data transfer clock signal input terminal Not used
38
PWDET
I
Power failure detection signal input terminal “L”: power failure, “H”: power on
39
REMIN
I
Remote control signal input from the remote control receiver
40
VSS
—
Ground terminal
41
CD-DATA
O
Serial data output to the CD block
42
ENCODER A
I
Jog dial pulse input from the rotary encoder (A phase input)
43
ENCODER B
I
Jog dial pulse input from the rotary encoder (B phase input)
44
REC IN
I
Tape play/rec detect sensor input terminal “L” input when the tape play/rec detect
45
NC
—
Not used
46
VDD1
—
Power supply terminal (+4.2V)
47
CAR EX
I
Switch input from the CD block “H”: when elevator is moving
