16
CDC-R104/X104/X144
• IC501 MN101E01KAB (SYSTEM CONTROL) (MAIN BOARD (1/2))
Pin No. Pin Name I/O Pin Description
1DAVDD — Power supply pin for D/A output converter (+3.3 V)
2BBE-MP O Not used in this set. (Open)
3DAVSS — Ground pin for D/A output converter
4 to 6 NCO O Not used in this set. (Open)
7UNISO O SONY-BUS data signal output Not used in this set. (Open)
8UNISI I SONY-BUS data signal input Not used in this set.
9UNICKO O SONY-BUS clock signal output Not used in this set.
10 VDD1 — Power supply pin for internal core (+3.3 V)
11 MMOD I Flash microcomputer write detection signal input Not used in this set.
12 OSCOUT O High speed operation clock signal output (27 MHz)
13 OSCIN I High speed operation clock signal input (27 MHz)
14 VSS1 — Ground pin for internal core
15 XIN I Low speed operation clock signal input (32.768 kHz)
16 XOUT O Low speed operation clock signal output (32.768 kHz)
17 VDD2 — Power supply pin for internal core (+3.3 V)
18 MOD1 — Pull up: “H”
19 RESET I Reset signal input
20 NCO O Not used in this set. (Open)
21 ACC IN I Accessory power supply detection signal input
22 TEST IN I Test mode detection signal input
23 TEL ATT I Telephone attenuate detection signal input
24 ATT O Audio mute control signal output
25 XKEYON O Key power supply control signal output Not used in this set. (Open)
26 NCO O Not used in this set. (Open)
27 KEYACK I Key acknowledge detection signal input
28 TU ATTIN I Tuner mute ZERO cross detection signal input
29, 30 NCO O Not used in this set. (Open)
31 BUIN I Back up power supply detection signal input
32 CD INTQ I CD servo IC CD text pack synchronization signal input
33 CD SO O CD servo IC serial data signal output (for command/text)
34 CD SI I CD servo IC serial data signal input (for command/text)
35 CD SCK O CD servo IC serial clock signal output (for command/text)
36 BUSON O BUS on signal output
37 SYSRST O System reset signal output
38 CD RFOK I CD servo IC RFOK signal input
39 CD RST O CD servo IC reset signal output
40 CD A0 O CD servo IC command/parameter identification signal output
Command transmission: “L”, Parameter transmission: “H”
41 CD STB O CD servo IC data strob signal output
42 CD MUTE R I Mechadeck mute zero cross detection signal input R
43 CD MUTE L I Mechadeck mute zero cross detection signal input L
44 CD INSW I CD mecha disc in switch detection signal input
45 CD SELFSW I CD mecha self load position detection switch signal input
46 CD LM LO O CD mecha loading motor control signal output
47 CD LM EJ O CD mecha eject motor control signal output
48 CD DSW I CD mecha down switch detection signal input
49 CD LIMIT I CD mecha in-limit switch signal input
50 NCO O Not used in this set. (Open)
51 AREASEL1 I Destination function setting input 1
52 AREASEL2 I Destination function setting input 2
53 AREASEL3 I Destination function setting input 3
