Sony HCD-MD515 - Component For Dhcmd515, Service Manual, Page: 67 / 110

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MAIN BOARD IC400 µPD780016YGF-021-3BA (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Function
1 to 8 O Not used (open)
9 VPP — Ground terminal
10 X2 O Main system clock output terminal (5 MHz)
11 X1 I Main system clock input terminal (5 MHz)
12 VDD (B/U) — Power supply terminal (+5V) (for back up)
13 XT2 O Sub system clock output terminal (32.768 kHz)
14 XT1 I Sub system clock input terminal (32.768 kHz)
15 RESET
I
System reset signal input terminal from the reset signal generator (IC401)
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
16 AUB-IN I Audio bus signal input terminal
17 AUB-OUT O Audio bus signal output terminal
18 YBCLK0 O Clock signal output terminal to the master controller (IC500) and CD mechanism controller (IC600)
19 YBCLKI I Clock signal input terminal to the master controller (IC500) and CD mechanism controller (IC600)
20 YBUS BSY I Busy signal input from the master controller (IC500)
21 RDS CLK I Clock signal input from the RDS decoder (IC361) (AEP, UK, German, North European models only)
22 RDS DATA I Serial data input from the RDS decoder (IC361) (AEP, UK, German, North European models only)
23 VDD (B/U) — Power supply terminal (+5V) (for back up)
24 AVREF I Reference voltage (+5V) input terminal (for A/D converter)
25 KEY0 I Key input terminal DIMMER key input (S701)
26 KEY1 I Key input terminal POWER, GROOVE, DBFB key input (S700, 703, 704)
27 KEY2 I Key input terminal CD1 to 3
6
, MD
6
key input (S705 to 707, 780)
28 to 31 — Not used (fixed at “L”)
32 AC CUT I Power down detection input terminal “L”: power down
33 AVSS — Ground terminal (for A/D converter)
34 O Not used (open)
35 FL-DATA O Serial data output to the fluorescent indicator tube driver (IC700)
36 FL-CLK O Clock signal output to the fluorescent indicator tube driver (IC700)
37 FL-CS O Chip select signal output to the fluorescent indicator tube driver (IC700)
38 AC ON O
Reset signal output to the fluorescent indicator tube driver (IC700) and LED driver (IC701)
“L”: reset
39 O Not used (open)
40 VSS — Ground terminal
41 ISIRCS I Remote commander signal input from the SIRCS/infrared remote control select switch (IC703)
42 WSIRCS I Wired SIRCS signal input from detachable controller (RM-MD515)
43 LED LAT O Serial data latch pulse signal output to the LED driver (IC701)
44 LED DATA O Serial data output to the LED driver (IC701)
45 LED CLK O Clock data output to the LED driver (IC701)
46 427 LAT O Serial data latch pulse signal output to the M62427FP-A (IC111)
47 427 DATA O Serial data output to the M62427FP-A (IC111)
48 427 CLK O Clock signal output to the M62427FP-A (IC111)
49 4052 INH O INH output to the function switch (IC100)
50, 51 O Not used (open)
52 I Not used (fixed at “L”)
53, 54 O Not used (open)
55, 56 N-CH O/D I Not used (fixed at “L”)
57 to 60 SUFFIX I Input terminal for the set model setting *1
61 to 64 I Not used (fixed at “L”)
65 EWS IN I Monitor input from external device Not used (fixed at “H”)