Read Sony CDX-R3350 / CDX-R3350C Service Manual online
31
CDX-R3350/R3350C
• IC501 MB90488BPF-G-122-BNDE1 (SYSTEM CONTROL) (MAIN BOARD (3/3))
Pin No.
Pin Name
I/O
Pin Description
1
AREASEL2
I
Destination function setting signal input 2
2
AREASEL1
I
Destination function setting signal input 1
3
AREASEL0
I
Destination function setting signal input 0
4
COL SW
I
LED color switch signal input
5
BEEP
O
Beep signal output
6
LIST SEL
I
List select signal input
7
NOSE SW
I
Front panel attachment detection signal input “L”: with panel
8
DIAG
I
Condition signal input from power amplifier
9
VOLATT
O
Electronic volume attenation control signal output
10
NCO
O
Not used. (Open)
11
VSS
—
Ground pin
12
TUATT
O
Tuner mute control signal output
13
NSMASK
O
Noise mask signal output
14
ILLUMI SEL1
I
Illumination voltage setting signal input 1
15
ILLUMI SEL2
I
Illumination voltage setting signal input 2
16
NCO
O
Not used. (Open)
17
AUXIN
O
AUX light change signal output “L”: AUX, “H”: BUS IN
18
CD SI
O
Not used in this set. (Open)
19
CD SO
O
Not used in this set. (Open)
20
CD SCK
O
Not used in this set. (Open)
21, 22
NCO
O
Not used. (Open)
23
VCC5
—
Power supply pin
24
EEP SIO
I/O
Serial data input/output for EEPROM communication
25
EEP CKO
O
Serial clock output for EEPROM communication
26
AMPSTB
O
Standby signal output to power amplifier
27
LCD CE
O
Chip enable signal output to LCD driver
28
LCD SO
O
Serial data signal output to LCD driver
29
LCD CKO
O
Serial clock signal output to LCD driver
30
RDS ON
O
RDS on signal output Tuner on: “L”
31, 32
NCO
O
Not used. (Open)
33
I2C CKO
O
I2C BUS serial clock signal output
34
I2C SIO
I/O
I2C BUS serial data signal input/output
35
DAVDD
—
A/D converter power supply pin
36
AVRH
—
A/D converter reference power supply pin
37
DAVSS
—
A/D converter ground pin
38
QUALITY
I
Noise detection signal input
39
VSM
I
S-meter voltage detection signal input
40
KEYIN1
I
Key signal input 1
41
KEYIN0
I
Key signal input 0
42
VSS
—
Ground pin
43
RC IN0
I
Rotary commander key signal input 0
44 to 48
NCO
O
Not used. (Open)
49, 50
MD0, MD1
I
Operation mode designation signal input Fixed at “H” in this set.
51
MD2
I
Operation mode designation signal input Fixed at “L” in this set.
52
KEYACK
I
Key acknowledge detection signal input
53
TU ATTIN
I
Tuner mute zero cross detection signal input
54
BUIN
I
Backup power supply detection signal input
55
CD INTQ
O
Not used in this set. (Open)
56
DAVN
I
RDS data block synchronization detection signal input
57
NCO
O
Not used. (Open)
58
UNISI
I
SONY BUS data signal input
59
UNISO
O
SONY BUS data signal output
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