Sony MDS-S40 - Page 34

– 34 –
• MAIN BOARD IC501 M30620MC-400FP (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1, 2 NC
O Not used (open)
3C1O
Monitor output terminal for the test C1 error rate is output when test mode
4
ADER
O
Monitor output terminal for the test ADER is output when test mode
5 SQSY
I
Subcode Q sync (SCOR) input from the CXD2654R (IC121)
“L” is input every 13.3 msec Almost all, “H” is input
6 RMC
I Remote control signal input from the remote control receiver (IC781)
7 A1 IN
I Sircs remote control signal input of the CONTROL A1 Not used
8 BYTE
I External data bus line byte selection signal input “L”: 16 bit, “H”: 8 bit (fixed at “L”)
9 CNVSS
— Ground terminal
10 XT-IN
I Sub system clock input terminal (32.768 kHz) Not used (fixed at “L”)
11 XT-OUT
O Sub system clock output terminal (32.768 kHz) Not used (open)
12 S.RST I
System reset signal input from the reset signal generator (IC406) “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 GND
— Ground terminal
15 XIN
I Main system clock input terminal (10 MHz)
16 +3.3V
— Power supply terminal (+3.3V)
17
NMI I Non-maskable interrupt input terminal (fixed at “H” in this set)
18 DQSY
I
Digital In U-bit CD format subcode Q sync (SCOR) input from the CXD2654R (IC121)
“L” is input every 13.3 msec Almost all, “H” is input
19 P.DOWN
I Power down detection signal input terminal “L”: power down, normally: “H”
20
KEYBOARD CLK
I
Not used (open)
21
KEYBOARD DAT
A
I
Not used (open)
22 BEEP OUT
O Beep sound drive signal output terminal
23 XINT
I Interrupt status input from the CXD2654R (IC121)
24 to 27 NC
O Not used (open)
28 L3-CLOCK O
Serial data transfer clock signal output to the A/D, D/A converter (IC301)
29 NC
O Not used (open)
30 L3-DATA
O Serial data output to the A/D, D/A converter (IC301)
31 SWDT O
Writing data output to the CXD2654R (IC121)
32 SRDT I
Reading data input from the CXD2654R (IC121)
33 SCLK O
Serial clock signal output to the CXD2654R (IC121)
34 FLCS
O Chip select signal output to the FL/LED driver (IC761)
35
FLDATA O Serial data output to the FL/LED driver (IC761)
36 NC
O Not used (open)
37 FLCLK
O Serial data transfer clock signal output to the FL/LED driver (IC761)
38 to 41 NC
O Not used (open)
42 JOG1
I JOG dial pulse input from the rotary encoder (S713 = Cc +) (B phase input)
43 JOG0 I
JOG dial pulse input from the rotary encoder (S713 = Cc +) (A phase input)
44 NC
O Not used (open)
45
A1 OUT O Sircs remote control signal output of the CONTROL A1 Not used
46 NC
O Not used (open)
47 L3-MODE
O L3 mode control signal output to the A/D, D/A converter (IC301)
48 DA RST O
Reset signal output for the A/D, D/A converter “L”: reset Not used (open)
49 MUTE O
Audio line muting on/off control signal output terminal “L”: line muting on
50 STB O
Relay drive signal output for the power on/off “L”: standby mode, “H”: relay on