Sony HCD-NE3 - Page 34

30
HCD-NE3
• IC Pin Function Description
CONTROL BOARD IC801 LC877456C-53K5-E (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1
PWR ON O
Power relay drive signal output terminal “H”: on
2
CD ON O
Power on/off control signal output for the CD mechanism section
3 CD XTXCN O
Oscillation circuit control signal output to the CD DSP
“H”: auto oscillation, “L”: oscillation off
4 CD OPEN I CD lid open/close detection switch input terminal
5 CD XRST O
Reset signal output to the CD DSP
6 CD DATA O Serial data output to the CD DSP
7 CD SENS I Internal status (SENSE) signal input from the CD DSP
8 CD CLK O Serial data transfer clock signal output to the CD DSP
9
CD XLT
O
Serial data latch pulse output to the CD DSP
10
NC
—
Not used
11 RESET I
Reset signal input from the reset switch “L”: reset For several hundreds msec. after the power
supply rises, “L” is input, then it changes to “H”
12
XT1 I Sub system clock input terminal (32.768 kHz)
13
XT2 O Sub system clock output terminal (32.768 kHz)
14
VSS1 — Ground terminal
15 CF1 I
Main system clock input terminal (10 MHz)
16 CF2 O
Main system clock output terminal (10 MHz)
17 VDD1 —
Power supply terminal (+3.2V)
18
I POWER
MONITOR
I
Power monitor input terminal
19, 20
NC
—
Not used
21
AREA I Model destination setting terminal
22
VOL ENCODER
I Dial pulse input of the rotary encoder (for VOLUME control)
23
I POWER DOWN
I
Power down detection signal input terminal “L”: power down, normally : “H”
24 TA-SW
I Cassette in/out detect switch signal input from the tape mechanism deck “L”: cassette in
25, 26
KEY1, KEY0 I Front panel key input terminal (A/D input)
27
CD SCOR
I
Subcode sync (S0+S1) detection signal input from the CD DSP
28
F DATA
O
Serial data output to the electrical volume
29 RMC I
Remote control signal input from the remote control receiver
30 TU DI I Serial data input from the FM/AM tuner unit
31
NC
—
Not used
32 TU DO O Serial data output to the FM/AM tuner unit
33 TU MUTE O Tuner muting on/off control signal output to the FM/AM tuner unit
34 TU CLK O serial data transfer clock signal output to the FM/AM tuner unit
35 TU CE O Chip enable signal output to the FM/AM tuner unit
36 TU TUNED I Tuning detection signal input from the FM/AM tuner unit
37 TU STEREO I FM stereo detection signal input from the FM/AM tuner unit
38
NC
—
Not used
39
ST/BY O
LED drive signal output terminal
40
MD LED O
LED drive signal output terminal