Ic Pin Function Description - Sony HCD-EP707 Service Manual

5-15. IC PIN FUNCTION DESCRIPTION

• DISPLAY BOARD IC101 µPD780206GF-127-3BA (SYSTEM CONTROLLER)
Pin No. Pin Name
1 VDD3
2 POWER
3 MUTE
4
PLL-CE
5
SOUND ENABLE
PRO-LOGIC-
6
ENABLE
7
DAW M–
8 STROBE
9
CD-RESET
10
RESET
11
X2
12 X1
13 IC (VPP)
14, 15 NC
16 VDD2
17 CLK
18 DATA OUT
19 DATA IN
20
CAR M+
21
CAR M–
22 EEPROM CLK
23 EEPROM DATA
24
DAW M+
25
AVSS
26 RDS DATAIN
27
TUNER STATION
28 AMS
29
KEY5
30
KEY4
31 to 33
KEY3 to KEY1
34 AVDD
35
AVREF
36 CD CLK
37 RDS CLKIN
38 PWDET
39
REMIN
40
VSS
41 CD-DATA
42 ENCODER A
43
ENCODER B
44
REC IN
45 NC
46 VDD1
47 CAR EX
I/O
— Power supply terminal (+4.2V)
O
Power on/off control signal output terminal "L": standby, "H": power on
O Muting on/off control signal output terminal "H": active
O PLL chip enable signal output to the FM/AM PLL "H" active
O Sound enable signal output terminal Not used
O Pro logic enable signal output terminal Not used
O Drawer motor drive signal output terminal "L": active
O Strobe signal output for the function select IC
O Reset signal output to the CD block "L": reset
I Reset signal input from the reset switch "L": reset
O System clock output terminal (4.19MHz)
I System clock input terminal (4.19MHz)
—
Connected to granud
— Not used
— Power supply terminal (+4.2V)
O Serial data transfer clock signal output to the function select IC
O
Serial data output to the function select IC
I
Serial data input from the FM/AM PLL
O Carriage motor drive signal output terminal "L": active
O Carriage motor drive signal output terminal "L": active
O
Serial data transfer clock signal output to the EEPROM and input select IC
I/O
Two-way data bus with the EEPROM and input select IC
O Drawer motor drive signal output terminal "L": active
— Ground terminal (for A/D converter)
I
RDS serial data input terminal Not used
I Tuning detection signal input from the LA1823 "L": tuned, "H": detuned
I
Automatic music sensor detection signal input terminal
I Key input terminal (A/D input)
I Key input terminal (A/D input) Not used
I Key input terminal (A/D input)
— Power supply terminal (for A/D converter) (+4.2V)
I
Reference voltage (+4.4V) input terminal (for A/D converter)
O
Serial data transfer clock signal output to the CD block
I RDS serial data transfer clock signal input terminal Not used
I Power failure detection signal input terminal "L": power failure, "H": power on
I Remote control signal input from the remote control receiver
— Ground terminal
O
Serial data output to the CD block
I Jog dial pulse input from the rotary encoder (A phase input)
I Jog dial pulse input from the rotary encoder (B phase input)
I Tape play/rec detect sensor input terminal "L" input when the tape play/rec detect
— Not used
— Power supply terminal (+4.2V)
I Switch input from the CD block "H": when elevator is moving
Description
HCD-EP707
31