Read Sony CDX-R3300 / CDX-R3300S / CXS-R330GF Service Manual online
17
CDX-R3300/R3300S
• IC801 MB90467PF-G-104-BNDE1 (SYSTEM CONTROL) (MAIN BOARD (2/2))
Pin No.
Pin Name
I/O
Pin Description
1
ATT
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
6
VOL 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 Not used in this set. (Open)
19
CD SO
O
CD servo serial data signal output Not used in this set. (Open)
20
CD SCK
O
CD servo serial clock signal output Not used in this set. (Open)
21
RE 0
I
Rotary encoder signal input Not used in this set.
22
RE 1
I
Rotary encoder signal input Not used in this set.
23
VCC+3.3
—
Power supply pin (+3.3 V)
24
EEP SIO
I/O
Serial data signal input/output for EEPROM communication
25
EEP SCK
O
Serial clock signal output for EEPROM communication
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
E: Rotary commander key signal input US, Canadian: Not used in this set. (Open)
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
Not used in this set. (Open)
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
59
UNI SO
O
Serial data signal output
60
UNI SCK
O
Serial clock signal output
61
BUS ON
O
Bus on signal output
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