Sony MXD-D5C, Service Manual

Page: 87 / 106

87
Pin No. Pin Name I/O Description
1 to 7 NC O 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. 11 NC O Not used (open)
12 XRESET I
System reset signal input from the CD mechanism controller (IC800) “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 (+5V)
17 NMI I Non-maskable interrupt input terminal “L” active (fixed at “H” in this set)
18. 19 NC O
Not used (open)
20 CMD CS I
Communication INT signal input from the CD mechanism controller (IC800)
21 to 24 NC O
Not used (open)
25 FLBK O
Blanking signal output to the fluorescent indicator tube (FL900)
26 CMD REQ O
Serial data transfer request signal output to the CD mechanism controller (IC800)
27 CMD BUSY O
Serial data transfer permission signal output to the CD mechanism controller (IC800)
28 CMD CLK I
Serial data transfer clock signal input from the CD mechanism controller (IC800)
29 CMD RXD I
Serial data input from the CD mechanism controller (IC800)
30 CMD TXD O
Serial data output to the CD mechanism controller (IC800)
31 TXD1 O
Not used (open)
32 RXD1 O
Not used (open)
33 CLK1 O
Not used (open)
34 RTS1 O
Not used (open)
35 FL TXD O
Display serial data output to the fluorescent indicator tube (FL900)
36 NC O
Not used (fixed at “L”)
37 FL CLK O
Display serial data transfer clock signal output to the fluorescent indicator tube (FL900)
38 FL LAT O
Display latch signal output to the fluorescent indicator tube (FL900)
39 RDY I
Not used (fixed at “H”)
40 ALE O
Not used (open)
41 HOLD I
Not used (open)
42 HPLDA O
Not used (open)
43 BCLK O
Not used (open)
44 RD O
Not used (open)
45 BHE O
Not used (open)
46 WR O
Not used (fixed at “L”)
47 to 49 P47 to P45 O
Not used (fixed at “L”)
50 FNT CE O
Not used (open)
51 OPEN O
Not used (fixed at “H”)
52 to 61 A18 to A9 O Not used (open)
62 VCC — Power supply terminal (+5V)
63 A8 O Not used (open)
64 VSS — Ground terminal
65 to 72 A7 to A0 O Not used (open)
73 to 80 NC O Not used (open)
• MAIN BOARD IC805 M30622MA-1BOFP (DISPLAY CONTROLLER)