Sony MXD-D4 Service Manual page 74

• MAIN BOARD IC800 M30624MGA-322FP (CD MECHANISM CONTROLLER)
Pin No. Pin Name
1 CD DATA
2 CD CLK
3 XLT
4 SIRCS
5 NC
6 SQ DATA
7
SQCLK
8 BYTE
9 CNVSS
10 HOLD
11 SENS
12 RESET
13 XOUT
14 VSS
15 XIN
16 VCC
17
NMI
18 PDOWN
19 SCOR
20 KEY CLK
21 KEY DATA
22 KEY MUTE
23 NC
24 LINE MUTE
25 LDON
26 MD RST
27 DAC MUTE
28 EXT ON
29 IICCLK
30 IICDATA
31 TXD1
32 RXD1
33 CLK1
34 RTS1
35 FLWITE
36 FLREAD
37 FLCLK
38 FLCS
39 FLREQ
40 FLBUSY
41 NC
42 1-4
43 1-2
44
8-12
74
I/O
O Serial data output to the CD block
O Serial data transfer clock signal output to the CD block
O Serial data latch pulse signal output to the CD block
I Remote control signal input from the remote control receiver (IC781)
O Not used (open)
I Subcode Q data input from the CD block
O
Subcode Q data reading clock signal output to the CD block "L": active
I External data bus line byte selection signal input "L": 16 bit, "H": 8 bit (fixed at "L")
— Ground terminal
O Laser power control signal output terminal Not used (open)
I Internal status (SENSE) input from the CD block
System reset signal input from the reset signal generator (IC505) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
O Main system clock output terminal (10 MHz)
— Ground terminal
I Main system clock input terminal (10 MHz)
— Power supply terminal (+5V)
I Non-maskable interrupt input terminal "L" active (fixed at "H" in this set)
I Power down detection signal input terminal "L": power down, normally: "H"
I Subcode sync (S0+S1) detection signal input from the CD block "H": active
I Serial clock signal input terminal Not used (open)
I Serial data input terminal Not used (open)
O Serial clock control signal output terminal Not used (open)
O Not used (open)
O
Audio line muting on/off control signal output "L": line muting on
O
Laser diode on/off control signal output to the automatic power control circuit "H": laser on
O Reset signal output to the system controller (IC801)
O Muting control signal output to the D/A converter (IC300)
O Not used (open)
Communication data reading clock signal output or transfer clock signal input with the system
I/O
controller (IC801)
I/O
Communication data bus with the system controller (IC801)
O
Not used (open)
O
Not used (open)
O
Not used (open)
O
Not used (open)
O Serial data output to the display controller (IC751)
I Serial data input from the display controller (IC751)
O Serial data transfer clock signal output to the display controller (IC751)
O Serial data transfer request signal output to the display controller (IC751)
I Serial data transfer request signal input terminal Not used (open)
I Serial data transfer permission signal input terminal Not used (open)
O Not used (fixed at "L")
O Disc speed selection (normal/4 speed) signal output to the CD block
O Disc speed selection (normal/2 speed) signal output to the CD block
O Disc size selection signal output to the CD block
Description