Sony HCD-EC68P - Page 45

HCD-EC68P/EC78P
45
PANEL BOARD IC301 MB90F831PF-G-SPE1 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1 SEG32 O Segment drive signal output to the liquid crystal display
2 O-AMP-ON O Relay drive signal output terminal (for speaker)
3 O-POWER O Main power on/off control signal output terminal "H": on
4 O-CD-ON O CD power on/off control signal output terminal "H": on
5 to 7
I-3CD-SW3/O-CDM-
CLOSE, I-3CD-SW2/
NC, I-3CD-SW1/
O-CDM-OPEN
I Detection switch input terminal
8
O-3CD-M1+/
O-CDM-M1+
O Motor drive signal output terminal
9 I-RMC I Remote control signal input from the remote control receiver
10
O-3CD-M1-/
O-CDM-M1-
O Motor drive signal output terminal
11, 12
O-3CD-M2+/NC,
O-3CD-M2-/NC
O Motor drive signal output terminal
13 X0A I Sub system clock input terminal (32.768 kHz)
14 X1A O Sub system clock output terminal (32.768 kHz)
15 VCC - Power supply terminal (+3.1V)
16 VSS - Ground terminal
17 to 20
I/O-CD-BUS0 to
I/O-CD-BUS3
O Serial data output to the CD-MP3 processor
21 I-3CD-CHACK I Disc chucking detection switch input from the CD mechanism deck (EC78P: UK model)
22 I-3CD-STOCK I Disc stocking detection switch input from the CD mechanism deck (EC78P: UK model)
23 O-DR-MUTE O Muting signal output to the motor/coil driver
24 I-REQ I Request signal input from the CD-MP3 processor
25 O-CD-BUCK O Serial data transfer clock signal output to the CD-MP3 processor
26 O-CD-CCE O Chip enable signal output to the CD-MP3 processor
27 O-CD-RST O System reset signal output to the CD-MP3 processor "L": reset
28 O-LED-STBY O LED drive signal output terminal for STANDBY indicater
29 I-USB-TXD/I-DMP-TXD I Serial data input from the DMPORT connector
30
I-USB-DO/
I-DMP-5V-DET
I Power voltage detection signal input terminal
31
O-USB-RXD/
O-DMP-RXD
O Serial data output to the DMPORT connector
32 AVCC - Power supply terminal (+3.1V)
33 I-TU-DO I Serial data input from the AM/FM DET
34
O-USB-DI/5V-ON/
O-TP-REC-MUTE
O Power on/off control signal output terminal
35 AVSS - Ground terminal
36 I-P-MONI I Power monitor signal input terminal
37, 38 I-KEY1, I-KEY2 I Front panel key input terminal (A/D input)
39 I-TU-ANSD I Power monitor signal input terminal
40
O-USB-SEL1_2/O-SW-
ON/I-TP-STATE
I Tape syate detection signal input terminal Not used
41 I-KEY-WAKE-UP/VOL I System wake up signal input terminal
42 I-HOLD I Hold signal input terminal
43 O-CD-SBSY I Subcode block sync signal input from the CD-MP3 processor
44 GND - Ground terminal
45
I-DMP-DET/
O-USB-RST
I DMPORT connector detection signal input terminal
46 I-MODEL I Model setting terminal
47 I-SUFFIX I Suffi x setting terminal
48
I-1CD-CLOSE_OPEN/
NC
I CD table open/close detection signal input terminal (EC78P: UK model)
49 I/O-I2C-DATA I/O Two-way serial data bus with the electrical volume
50 I/O-I2C-CLK O Serial data transfer clock signal output to the electrical volume
51 to 53 MD2 to MD0 - Not used
54 I-RST I
Reset signal input from the voltage detect "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
55 O-TU-CE O Chip enable signal output to the FM/AM DET
56 O-TU-CLK O Serial data transfer clock signal output to the FM/AM DET