Sony CDX-GT42IPW Service Manual page 36

CDX-GT42IPW/GT44IP/GT420IP
• IC PIN DESCRIPTIONS
• IC501 MB90F045PF-G-9059-SPE1 (SYSTEM CONTROL) (MAIN BOARD (4/4))
Pin No. Pin Name
1 AREASEL0
2 AREASEL1
3 AREASEL2
4 B OUT SEL
5 BEEP
6 NCO
7 DIAG
8 AMPSTB
9 VOLATT
10 NCO
11 VSS
12 TUATT
13 NSMASK
14 SA OUT
15 SA CLK
16 ILLUMI SEL
17 COL SEL
18 to 22 NCO
23 VCC5
24 EEP_SIO
25 EEP_CKO
26 RDS ON
27 LCD_CE
28 LCD_SO
29 LCD_SCK
30 NCO
31 RE-IN0
32 RE-IN1
33 I2C_SCK
34 I2C_SIO
35 DAVDD
36 AVRH
37 DAVSS
38 QUALITY
39 VSM
40 KEYIN1
41 KEYIN0
42 VSS
43 RC_IN0
44, 45 NCO
46 SA IN
47 NCO
48 AD_ON
49 MD0
50 MD1
51 MD2
52 KEYACK
53 TU_ATTIN
36
I/O
I Destination function setting pin 0
I Destination function setting pin 1
I Destination function setting pin 2
I Black out with/without discrimination select signal input
O BEEP signal output to power amplifier
O Not used. (Open)
I Status signal input from power amplifier
O Stand-by signal output to power requlation
O Electronic volume attenuate control signal output
O Not used. (Open)
— Ground pin
O Tuner mute control signal output
O Noise mask signal output
O Serial data signal output for electronic volume spectrum analyzer
O Serial clock signal output for electronic volume spectrum analyzer
I Illumination voltage setting signal input
I Two colors select signal input
O Not used. (Open)
— Power supply pin (+3.3V)
I/O EEPROM bus serial data signal input/output
O EEPROM bus serial clock signal output
O RDS (radio data system) ON signal output
O Chip enable signal output to LCD driver
O Serial data signal output to LCD driver
O Serial clock signal output to LCD driver
O Not used. (Open)
I Rotary encoder signal input 0
I Rotary encoder signal input 1
O I2C bus serial clock signal output
I/O I2C bus serial data signal input/output
— A/D converter power supply pin (+3.3V)
— A/D converter external reference power supply pin (+3.3V)
— A/D converter Ground pin
I Noise detect signal input
I S-meter voltage detect signal input
I Key signal input 1
I Key signal input 0
— Ground pin
I Rotary commander key signal input
O Not used. (Open)
I Serial data signal input for electronic volume spectrum analyzer
O Not used. (Open)
O A/D converter power supply control signal output
I Operation mode setting pin 0 (Pull up)
I Operation mode setting pin 1 (Pull up)
I Operation mode setting pin 2 (Pull down)
I Key acknowledgment detect signal input
I Tuner mute zero cross detect signal input
Pin Description
"H": Black out
"H": 10.4 V, "L": 9.0 V
"H": Two colors, "L": color
Not used in this set. (Pull up)