Sony CDX-GT500EE, CDX-GT50W IC711 MB90487APF-G-162E1 System Control Main Board 3/3, RDS on

CDX-GT50W/GT500/GT500EE/GT550

IC711 MB90487APF-G-162E1 (SYSTEM CONTROL) (MAIN BOARD (3/3))

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				NCO	O	Not used. (Open)
5					I	Front panel open/close detect signal input L: Panel on, H: Panel off
		NOSE SW
6				NCO	O	Not used. (Open)
7				BEEP	O	Beep signal output
8				DIAG	I	Power AMP status signal input
9					O	Electronic volume attenuate control signal output
			VOL ATT
10			FSW IN		I	D/D converter oscillater frequency count signal input
11				VSS	—	Ground pin
12			TUATT		O	Tuner mute control signal output
13		NSMASK			O	Noise mask signal output (AEP, UK model only)
14	ILLUMI SEL				I	Illumination voltage setting signal input
15				SEL1	O	Not used in this set. (Open)
16				NCO	O	Not used. (Open)
17					O	AUX select signal output L: AUX, H: BUS IN
				AUXIN
18	DISP RSET				O	Display reset signal output
19				FL ON	O	D/D converter control signal output H: On
20			DISP ON		O	Display control signal output H: On
21				ATT	O	Audio mute control signal output
22					O	System control reset signal output
			SYSRST
23				VCC5	—	Power supply pin (+3.3 V)
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 satandby signal output
27			DISP RX		I/O	Display IC communication signal input/output
28			DISP TX		O	Display IC communication signal output
29			MAST IF		O	Display IC communication start signal output
30			RDS ON		O	RDS ON signal output (AEP, UK model only)
31			RE IN0		I	Rotary encoder signal input 0
32			RE IN1		I	Rotary encoder signal input 1
33			I2C SCK		O	I2C bus serial clock signal output
34			I2C SIO		I/O	I2C bus serial data signal input/output
35			DAVDD		—	A/D converter power supply pin (+3.3 V)
36				AVRH	—	A/D converter external reference power supply pin (+3.3 V)
37			DAVSS		—	Ground pin
38		QUALITY			I	Noise detect signal input (AEP, UK model only)
39				VSM	I	S-meter voltage detect signal input
40			KEYIN1		I	Key signal input 1
41			KEYIN0		I	Key signal input 0
42				VSS	—	Ground pin
43			RC IN0		I	Rotary commander key signal input
44				SA IN	I	Spectrum analyzer signal input
45			SA CKO		O	Spectrum analyzer clock signal output
46 to 48				NCO	O	Not used. (open)
49				MD0	I	Operation mode setting pin (Connect to VDD.)
50				MD1	I	Operation mode setting pin (Connect to VDD.)
51				MD2	I	Operation mode setting pin (Connect to VSS.)

38