Sony CDX-GT40W Service Manual page 36

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