Sony MXD-D40 - Page 79

79
MXD-D40
• MAIN BOARD IC801 M30803MG (MD MECHANISM CONTROLLER)
Pin No. Pin Name I/O Description
1, 2 NC
O Not used (open)
3 LEVEL_L
O L-ch level output to the CD mechanism controller (IC800)
4 LEVEL_R
O R-ch level output to the CD mechanism controller (IC800)
5 to 7 NC
O Not used (open)
8BYTE
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 Not used (open)
11 XOUT-T
O Sub system clock output terminal Not used (open)
12 S·RST I
System reset signal input “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 VCC
— Power supply terminal (+3.5V)
17
NMI I Non-maskable interrupt input terminal “L” active (fixed at “H” in this set)
18 DQSY
I
Digital In U-bit CD format subcode Q sync (SCOR) input from the CXD2662R (IC151)
“L” is input every 13.3 msec Almost all, “H” is input
19 P.DOWN
I Power down detection signal input terminal “L”: power down, normally: “H”
20 SQSY
I
Subcode Q sync (SCOR) input from the CXD2662R (IC151)
“L” is input every 13.3 msec Almost all, “H” is input
21 to 24 NC
O Not used (open)
25 XINT
I Interrupt status input from the CXD2662R (IC151)
26 NC
O Not used (open)
27 NC (CLIP)
O Serial data output terminal Not used (open)
28 NC
O Not used (open)
29 IIC CLK
I/O
Communication data reading clock signal output or transfer clock signal input with the CD
mechanism controller (IC800)
30 IIC DATA I/O
Communication data bus with the CD mechanism controller (IC800)
31
SWDT
O
Writing data output to the CXD2662R (IC151)
32 SRDT I
Reading data input from the CXD2662R (IC151)
33 SCLK O
Serial clock signal output to the CXD2662R (IC151)
34
RST1
O
Not used (open)
35 NC (CLIP)
O Serial clock signal output terminal Not used (open)
36 NC (CLIP)
O Not used (open)
37 NC (CLIP)
I Serial data input terminal Not used (open)
38 to 40
NC O Not used (open)
41
EPM I Not used (fixed at “L”)
42, 43
NC O Not used (open)
44 PROTECT I
Rec-proof claw detect input from the protect detect switch (S102-2) “H”: write protect
45 SCL O
Clock signal output to the EEPROM (IC195)
46
CE I Not used (fixed at “H”)
47 EEP-WP O
Writing protect signal output to the EEPROM (IC195)
48 XBUSY I
Busy signal input from the CXD2662R (IC151)
49 OUT-SW I
Detection input from the loading-out detect switch (S103)
“L” at a load-out position, others: “H”
50 XLATCH
O Serial data latch pulse signal output to the CXD2662R (IC151)