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MDS-S50
• MAIN BOARD IC1 M30805MG-211GP (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1
FL-DATA O Serial data output to the fluorescent indicator tube/LED driver (IC761)
2
FL-CLK O Serial data transfer clock signal output to the fluorescent indicator tube/LED driver (IC761)
3 A1 IN
I Sircs remote control signal input terminal of the CONTROL A1II Not used (fixed at “H”)
4RMC
I Remote control signal input from the remote control receiver (IC781)
5 to 7
NC O Not used (open)
8 MUTE O
Audio line muting on/off control signal output “L”: line muting on, “H”: line muting off
9 RESET O
Reset signal output to the A/D, D/A converter (IC500) “L”: reset
10 LATCH O
Serial data latch pulse signal output to the A/D, D/A converter (IC500)
11 LD-LOW
O
Loading motor drive voltage control signal output for the loading motor driver (IC440)
“H” active
12 LDIN O
Motor control signal output to the loading motor driver (IC440) “L” active *1
13 LDOUT
O Motor control signal output to the loading motor driver (IC440) “L” active *1
Laser modulation selection signal output to the HF module switch circuit
Stop: “L”, Playback power: “H”,
Recording power:
14 MOD
O
15 BYTE
I External data bus line byte selection signal input “L”: 16 bit, “H”: 8 bit (fixed at “L”)
16 CNVSS
— Ground terminal
17 XCIN
I Sub system clock input terminal (32.768 kHz) Not used (open)
18 XCOUT
O Sub system clock output terminal (32.768 kHz) Not used (open)
19 RESET I
System reset signal input from the regulator (IC400) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
20 XOUT
O Main system clock output terminal (10 MHz)
21 VSS
— Ground terminal
22 XIN
I Main system clock input terminal (10 MHz)
23 VCC
— Power supply terminal (+3.3V)
24
NMI I Non-maskable interrupt input terminal “L” active (fixed at “H” in this set)
25 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
26 PDOWN
I
Power down detection signal input from the regulator (IC400)
“L”: power down, normally: “H”
27 SQSY
I
Subcode Q sync (SCOR) input from the CXD2662R (IC151)
“L” is input every 13.3 msec Almost all, “H” is input
28 KEYBD-CLK
I Serial data transfer clock signal input from the key board Not used (fixed at “H”)
29 LDON O
Laser diode on/off control signal output to the automatic power control circuit “H”: laser on
30 LIMIT-IN
I
Detection signal input from the sled limit-in detect switch (S101)
The optical pick-up is inner position when “L”
31 A1 OUT
O Sircs remote control signal output terminal of the CONTROL A1II Not used (open)
2 sec
0.5 sec
*1 Loading motor (M103) control
LOADING EJECT BRAKE STOP
LDIN (pin qs)
“L”“H”“L”“H”
LDOUT (pin qd)
“H”“L”“L”“H”
Terminal
Mod
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