Sony CDP-EX770 - Page 130

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MAIN BOARD IC401 RU8X12MF-0010 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Function
1 DAOUT0 O
Output terminal for the test C1 is output when test mode
2 DAOUT1 O
Output terminal for the test ADER is output when test mode
3 KEY0 I
Key input terminal (A/D input)
fl, ), 0, p, ENTER/YES, EDIT/NO keys input (S701 to S706)
4 KEY1 I
Key input terminal (A/D input)
§ EJECT, PROGRAM, SHUFFLE, CONTINUE keys input (S711 to S714)
5 KEY2 I
Key input terminal (A/D input)
SCROLL, DISPLAY/CHARACTER, REPEAT, CD SYNC, r REC keys input (S722 to S726)
6 CHACK-IN I
Detection input from the disc chucking-in detect switch (S685) “L”: chucking
7 PACK-IN I
Detection input from the disc detect switch Not used (fixed at “H”)
8 PACK-OUT I
Detection input from the loading-out detect switch (S686) “L” at a load-out position, others: “H”
9
TIMER
I
Power switch (S408) input (for service)
10
NC
I
Not used (fixed at “L”)
11 AVSS
— Ground terminal
12 XINT
I Interrupt status input from the CXD2650R (IC121)
13 PDOWN
I
Power down detection signal input from the regulated power supply IC (IC501)
“L”: power down, normally: “H”
14
NC — Not used (connected to AUBK (pin %ª) in this set)
15 SQSY
I
Subcode Q sync (SCOR) input from the CXD2650R (IC121)
“L” is input every 13.3 msec Almost all, “H” is input
16 DQSY
I
Digital In U-bit CD format subcode Q sync (SCOR) input from the CXD2650R (IC121)
“L” is input every 13.3 msec Almost all, “H” is input
17
NC —
18
NC — Not used (open)
19
NC —
20 SYS-RST I
System reset signal input from the regulated power supply IC (IC501) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
21 TEST
I Input terminal for the test Fixed at “L” in this set
22 +3.3V
— Power supply terminal (+3.3V)
23 BACK
I Power supply terminal for the backup (for internal RAM)
24 XOUT-T
O Sub system clock output terminal (32.768 kHz)
25 XIN-T
I Sub system clock input terminal (32.768 kHz)
26 GND
— Ground terminal
27 XOUT
O Main system clock output terminal (12 MHz)
28 XIN
I Main system clock input terminal (12 MHz)
29 GND
— Ground terminal
30 S1 O
System clock output terminal Not used (open)
31
DOSEL
O
Not used (open)
32 SENS
I Internal status (SENSE) input from the CXD2650R (IC121)
33 SHOCK I
Track jump detection signal input from the CXD2650R (IC121)
34
NC — Not used (open)
35
CD/VIDEO
O
Selection signal output terminal for the optical-in signal (CD/VIDEO) “L”: CD, “H”: VIDEO
36 STB O
Strobe signal output to the regulated power supply IC (IC501)
“H”: power on, “L”: standby mode
37 REC-P I
Detection input from the recording position detect switch (S688) “L” active
38 PB-P I
Detection input from the playback position detect switch (S687) “L” active