55
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”)
4
RMC
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
Mode
