Sony CDX-M50IP Service Manual page 35

• IC Pin Description
IC501 MB90F045PF-G-9061-SPE1 (SYSTEM CONTROL) (MAIN BOARD (4/4))
Pin No. Pin Name
1 AREASEL0
2 AREASEL1
3 AREASEL2
4 AREASEL3
5 BEEP
6 AMPSTB
7 DIAG
8 NCO
9 SA_DATA
10 SA_CKO
11 VSS
12 TUATT
13 NSMASK
14 VOLATT
15 ILLUMI_SEL
16 to 20 NCO
21 B-OUT_SEL
22 NCO
23 VCC5
24 EEP_SIO
25 EEP_CKO
26 RDS_ON
27 LCD_CE
28 LCD_SO
29 LCD_SCK
30 DOOR_IND
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 INI_COL
45 COL_SEL
46 SA_IN
47 NCO
48 AD_ON
49, 50 MD0, MD1
51 MD2
52 KEYACK
I/O
I Destination setting pin (L: CDX-M50IP, H: CDX-MR50IP)
I Destination setting pin (Fixed at L in this set)
Destination setting pin (L: FM (200k)/AM (10k), H: FM (50k)/AM (9k)
I
(CDX-M50IP only))
I Destination setting pin (L: CDX-MR50IP, H: CDX-M50IP)
O Beep signal output to power amp IC.
O Standby signal output to power amp IC.
I Status signal input from power amp IC.
O Not used. (Open)
O Data output for electronic volume IC spectrum analyzer.
O Spectrum analyzer clock signal output
— Ground
O Tuner mute control signal output
O Noise mask signal output (CDX-MR50IP only)
O Attenuator control signal output to electronic volume IC.
I Illumination voltage setting pin (L: illumination power supply 9 V)
O Not used. (Open)
I Black out select signal input (L: non black out)
O Not used. (Open)
— Power supply pin (+3.3 V)
I/O Serial data signal input/output for EEPROM communication.
O Serial clock signal output for EEPROM communication.
O RDS ON signal output (CDX-MR50IP only)
O Chip enable signal output to LCD drive IC.
O Serial data signal output to LCD drive IC.
O Serial clock signal output to LCD drive IC.
O DISC IN indicator LED control signal output
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
— Power supply pin for A/D converter. (+3.3 V)
— External reference power supply pin for A/D converter. (+3.3 V)
— Ground for A/D converter.
I Noise detection signal input (CDX-MR50IP only)
I S meter voltage detection signal input
I Key signal input 1
I Key signal input 0
— Ground
I Rotary commander key signal input
I Initial color setting signal input (L: red)
I Key illumination 2 colors select signal input (H: 2 color)
I Spectrum analyzer signal input
O Not used. (Open)
O A/D converter power supply control signal output
I Signal input for operation mode designation. (Fixed at H in this set)
I Signal input for operation mode designation. (Fixed at L in this set)
I Key acknowledge detection signal input
CDX-M50IP/MR50IP
Pin Description
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