16
CDX-R3000/RW300
• IC801 MB90473PF-G166-BNDE1 (SYSTEM CONTROL) (MAIN BOARD (2/2))
Pin No. Pin Name I/O Pin Description
1ATT O Audio mute control signal output
2 to 4 NC — Not used in this set. (Open)
5 BEEP O Beep signal output to power amp IC
6VOL ATT O Electrical volume ATT control output
7 to 10 NC — Not used in this set. (Open)
11 VSS — Ground pin
12 to 14 NC — Not used in this set. (Open)
15 TU ATT O Tuner mute control output
16, 17 NC — Not used in this set. (Open)
18 CD SI I CD servo serial data signal input
19 CD SO O CD servo serial data signal output
20 CD SCK O CD servo serial clock signal output
21 RE 0 O Not used in this set. (Open)
22 RE 1 O Not used in this set. (Open)
23 VCC+3.3 — Power supply pin (+3.3 V)
24 EEP SIO I/O Serial data signal input/output for EEPROM comunication
25 EEP SCK O Serial clock signal output for EEPROM comunication
26 SHUT SW I
Shutter switch open/close detect signal input
“L”: Panel open, “H”: Panel close
27 LCD CE O Chip enable signal output to LCD driver IC
28 LCD SO O Serial data signal output to LCD driver IC Flash: UART serial out
29 LCD SCK O Serial clock signal output to LCD driver IC
30 NC — Not used in this set. (Open)
31 STB O Standby signal output to power amp IC
32 AUX — Not used in this set. (Open)
33 IIC SCK O IIC bus serial clock signal output
34 IIC SIO I/O IIC bus serial data signal input/output
35 VCC+3.3 — Power supply pin (+3.3 V) (for A/D converter)
36 AVRH+3.3 — External reference power supply (+3.3 V) (for A/D converter)
37 AVSS — Ground pin (for A/D converter)
38, 39 KEY IN0, 1 I Key signal input
40 NC — Not used in this set. (Open)
41 RC IN0 I Rotary commander key signal input
42 VSS — Ground pin
43, 44 NC — Not used in this set. (Fixed at “L”.)
45 VSM I S meter voltage detect signal input
46 DST SEL I Destination select pin
47 KEY ACK I Key acknowledge detect signal input
48 NC — Not used in this set. (Open)
49, 50 MD0, 1 I Input for operation mode designation (Fixed at “H”.)
51 MD2 I Input for operation mode designation (Fixed at “L”.)
52 NC — Not used in this set. (Open)
53 BU IN I Back up power supply detect signal input
54 OP REQ/INTQ O OP REQ/INTQ select signal output
55 CD SELFSW I CD mechanism self load position detect switch signal input
56 DIAG I Condition input from power amp IC
57 TU ATT IN I Tuner ATT signal input Not used in this set. (Open)
58 UNI SI I Serial data signal input Not used in this set. (Open)
59 UNI SO O Serial data signal output Not used in this set. (Open)
60 UNI SCK O Serial clock signal output Not used in this set. (Open)
61 BUS ON O Bus on signal output
62 SYS RST O System reset signal output
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