Sony CDX-V3800 Service Manual page 30

CDX-V3800
• IC801 MB90488BPF-G-135-BNDE1 (SYSTEM CONTROL) (MAIN BOARD (3/3))
Pin No. Pin Name
1 LINE ATT
2 to 4 NC
5 BEEP
6 VOL ATT
7 to 10 NC
11 VSS
12 to 14 NC
15 TU ATT
16, 17 NC
18 CD SI
19 CD SO
20 CD SCK
21, 22 NC
23 VCC+3.3
24 EEP SIO
25 EEP SCK
26 SHUT SW
27 LCD CE
28 LCD SO
29 LCD SCK
30 NC
31 STB
32 AUX
33 IIC SCK
34 IIC SIO
35 VCC+3.3
36 AVRH+3.3
37 AVSS
38, 39 KEY IN0, 1
40 NC
41 NC
42 VSS
43, 44 NC
45 VSM
46 DST SEL
47 KEY ACK
48 NC
49, 50 MD0, 1
51 MD2
52 NC
53 BU IN
54 SP
55 CD SELFSW
56 DIAG
57 NC
58 UNI SI
59 UNI SO
60 UNI SCK
61 BUS ON
62 SYS RST
63 NC
30
I/O
O Audio mute control signal output
— Not used in this set. (Open)
O Beep signal output to power amp IC
O Electrical volume ATT control signal output
— Not used in this set. (Open)
— Ground pin
— Not used in this set. (Open)
O Tuner mute control signal output
— Not used in this set. (Open)
I CD servo serial data signal input
O CD servo serial data signal output
O CD servo serial clock signal output
— Not used in this set. (Open)
— Power supply pin (+3.3 V)
I/O Serial data signal input/output for EEPROM communication
O Serial clock signal output for EEPROM communication
Shutter switch open/close detect signal input
I
"L": Panel open, "H": Panel close
O Chip enable signal output to LCD driver IC
O Serial data signal output to LCD driver IC Flash: UART serial out
O Serial clock signal output to LCD driver IC
— Not used in this set. (Open)
O Standby signal output to power amp IC
— Not used in this set. (Open)
O IIC bus serial clock signal output
I/O IIC bus serial data signal input/output
— Power supply pin (+3.3 V) (for A/D converter)
— External reference power supply (+3.3 V) (for A/D converter)
— Ground pin (for A/D converter)
I Key signal input
— Not used in this set. (Open)
— Not used in this set. (Fixed at "H".)
— Ground pin
— Not used in this set. (Fixed at "L".)
I S meter voltage detect signal input
I Destination select pin
I Key acknowledge detect signal input
— Not used in this set. (Open)
I Input for operation mode designation (Fixed at "H".)
I Input for operation mode designation (Fixed at "L".)
— Not used in this set. (Open)
I Back up power supply detect signal input
O SP mode select signal output
I CD mechanism self load position detect switch signal input
I Condition input from power amp IC
— Not used in this set. (Open)
I Serial data signal input
O Serial data signal output
O Serial clock signal output Not used in this set. (Open)
O Bus on signal output
O System reset signal output
— Not used in this set. (Open)
Pin Description
Not used in this set. (Open)