Sony MXD-D4 - IC800 (CD Mechanism Controller) Pin Functions

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