Service manual

74
Pin No. Pin Name I/O Description
1 WMOUT O
Serial data output to the equipment connected to other unit Not used (open)
2 WMCLK I
Serial data transfer clock signal input from the equipment connected to other unit
Not used (fixed at “L”)
3 LEVEL-L O
Left channel level output to the master controller (IC501)
4 LEVEL-R O
Right channel level output to the master controller (IC501)
5 LEDDATA O
Serial data output terminal for the LED driver Not used (open)
6
—
O
Not used (open)
7 LEDCLK O
Serial data transfer clock signal output terminal for the LED driver Not used (open)
8 BYTE I
External data bus line byte selection signal input “L”: 16 bit, “H”: 8 bit (fixed at “L”)
9 CNVSS
— Ground terminal
10 XIN-T
I Sub system clock input terminal (32.768 kHz) Not used (fixed at “L”)
11 XOUT-T
O Sub system clock output terminal (32.768 kHz) Not used (open)
12 S.RST I
System reset signal input from the reset signal generator (IC931) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
13 XOUT
O Main system clock output terminal (10 MHz)
14 GND
— Ground terminal
15 XIN
I Main system clock input terminal (10 MHz)
16 3.3V
— Power supply terminal (+3.3V)
17
NMI
I
Non-maskable interrupt input terminal (fixed at “H” in this set)
18 P.DOWN
I Power down detection signal input terminal “L”: power down, normally: “H”
19 WMSYNC I
Sync signal input from the equipment connected to other unit Not used (fixed at “L”)
20 I2CBUSY O
Busy signal output for the I2C bus “L” active Not used (pull up)
21 L3CLK O
L3 bus data transfer clock signal output to the A/D, D/A converter (IC201)
22 L3DATA O
L3 bus data output to the A/D, D/A converter (IC201)
23
—
O
Not used (open)
24 ELEUP O
Mini-disc elevator up/down motor control signal output terminal
“H” active Not used (open)
25
—
O
Not used (open)
26 ELEDOWN O
Mini-disc elevator up/down motor control signal output terminal
“H” active Not used (open)
27 SQSY
I
Subcode Q sync (SCOR) input from the CXD2654R (IC121)
“L” is input every 13.3 msec Almost all, “H” is input
28 RESET SW I
Reset switch input terminal “L”: reset Not used (fixed at “L”)
29 I2CCLK I/O
Shift clock signal input/output terminal for the I2C bus
30 I2CDATA I/O
Serial data input/output terminal for the I2C bus
31 FLDATA O
Display serial data output terminal Not used (open)
32
—
O
Not used (open)
33 FLCLK O
Display serial data transfer clock signal output terminal Not used (open)
34 FLCS O
Display serial chip select signal output terminal “L” active Not used (open)
35 SWDT O
Writing data output to the CXD2654R (IC121)
36 SRDT I
Reading data input from the CXD2654R (IC121)
37 SCLK O
Serial clock signal output to the CXD2654R (IC121)
38 OPTSEL0
O Selection signal output for the optical input signal Not used (open)
39 SENSOR I
Elevator position detect sensor input terminal Not used (fixed at “L”)
40 SENSOR2 I
Elevator position detect sensor input terminal Not used (fixed at “L”)
41 HEADDOWN O
Over write head up/down motor control signal output terminal
“H” active Not used (open)
• MD DIGITAL BOARD IC316 M30624MG-A16FP (MD MECHANISM CONTROLLER)