Sony MXD-D4 - IC801 (System Controller) Pin Functions

77
Pin No. Pin Name I/O Description
1, 2 NC
O Not used (open)
3LVL L
O L-ch level output to the CD mechanism controller (IC800)
4LVL R
O R-ch level output to the CD mechanism controller (IC800)
5 to 7 NC
O Not used (open)
8 DAC MUTE O
Muting control signal output to the D/A converter (IC300) “L”: muting
9
RESET (AD/DA)
O
Reset signal output to the D/A converter (IC300), A/D converter (IC301) “H”: reset
10 SLICER SEL O
IEC958 input selection signal output to the D/A converter (IC300) “L”: MD, “H”: CD
11 LDLOW
O
Loading motor drive voltage control signal output for the loading motor driver (IC400)
“H” active
12 LDIN O
Motor control signal output to the loading motor driver (IC400) “L” active *1
13 LDOUT
O Motor control signal output to the loading motor driver (IC400) “L” active *1
Laser modulation select 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 XINT T
I Sub system clock input terminal Not used (open)
18 XOUT
O Sub system clock output terminal Not used (open)
19 RESET I
System reset signal input “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 (+3.5V)
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 terminal “L”: power down, normally: “H”
27 SQSY (ATSY)
I
Subcode Q sync (SCOR) input from the CXD2662R (IC151)
“L” is input every 13.3 msec Almost all, “H” is input
28 NC
O Not used (open)
29 LDON O
Laser diode on/off control signal output to the automatic power control circuit “H”: laser on
30 LIMIT-IN
I
Detection input from the sled limit-in detect switch (S101)
The optical pick-up is inner position when “L”
2 sec
0.5 sec
*1 Loading motor (M103) control
Mode
Terminal
LDIN (pin qs)
“L”“H”“L”“H”
LDOUT (pin qd)
“H”“L”“L”“H”
LOADING EJECT BRAKE RUN IDLE
• MAIN BOARD IC801 M30805SGP (SYSTEM CONTROLLER (MD MECHANISM CONTROLLER))