Read Sony CDX-GT400 / CDX-GT40W / CDX-GT450 / CDX-GT450S Service Manual online
36
CDX-GT40W/GT400/GT450/GT450S
• IC501 MB90F488BPF-G-156E1 (SYSTEM CONTROL) (MAIN BOARD (2/2))
Pin No.
Pin Name
I/O
Pin Description
1
AREASEL2
I
Destination setting pin
2
AREASEL1
I
Destination setting pin
3
AREASEL0
I
Destination setting pin
4
611_SEL
I
611WA/611TA setting pin
5
BEEP
O
Beep signal output
6
NCO
O
Not used (Open)
7
NOSE_SW
I
Front panel detect signal input
8
DIAG
I
Power AMP status signal input
9
VOLATT
O
Electronic volume attenuate control signal output
10
CYRIL_SEL
I
CYRIL/NON-CYRIL Setting pin
11
VSS
—
Ground
12
TUATT
O
Tuner mute control signal output
13
NSMASK
O
Not used (Open)
14
WMA
I
WMA mode setting pin
15
LCD_SEL
I
Illumination voltage setting pin
16
NCO
O
Not used (Open)
17
FUNC_SEL
O
BUS AUDIO IN/TUNER select signal output
18
NCO
O
Not used (Open)
19
NCO
O
Not used (Open)
20
NCO
O
Not used (Open)
21
NCO
O
Not used (Open)
22
NCO
O
Not used (Open)
23
VCC5
—
Power supply pin (+3.3V)
24
EEP_SIO
I/O
EEPROM bus serial data input/output
25
EEP_CKO
O
EEPROM bus serial clock output
26
AMPSTB
O
Power AMP standby signal output
27
LCD_CE/FLS_SI
O
LCD driver chip enable output
28
LCD_SO/FLS_SO
O
LCD driver serial data output
29
LCD_CKO
O
LCD driver serial clock output
30
RDSON
O
RDS ON signal output
31
NCO
O
Not used (Open)
32
NCO
O
Not used (Open)
33
I2C_CKO
O
I2C bus serial clock output
34
I2C_SIO
I/O
I2C bus serial data input/output
35
DAVDD
—
A/D converter power supply pin (+3.3V)
36
AVRH
—
A/D converter reference voltage supply pin (+3.3V)
37
DAVSS
—
Ground
38
QUALITY
I
Not used (Pull down)
39
VSM
I
S-meter voltage detect signal input
40
KEYIN1
I
Key signal input
41
KEYIN0
I
Key signal input
42
VSS
—
Ground
43
RC_IN0
I
Rotary commander key signal input
44
SA_IN
I
Spectrum analyzer data input
45
SA_CKO
O
Spectrum analyzer clock output
46
DOOR_IND
O
Door indicator on/off signal output
47
RE-1
I
Rotary encoder (Volume) signal input
48
RE-0
I
Rotary encoder (Volume) signal input
49
MD0
I
Operation mode setting pin
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