Sony Ericsson CDX-CA860X, CDX-CA850X service manual CDX-CA850/CA850X/CA860X, Not used. Open

CDX-CA850/CA850X/CA860X

•IC501 MB90574BPMT-G-323-BND (MAIN SYSTEM CONTROL) (CDX-CA850X/CA860X) (MAIN BOARD)

•IC501 MB90574BPMT-G-324-BND (MAIN SYSTEM CONTROL) (CDX-CA850) (MAIN BOARD)

Pin No.	Pin Name						I/O	Pin Description
1 – 4						NCO	O	Not used. (Open)
5						ATT	O	System mute control signal output
6, 7						NCO	O	Not used. (Open)
8						VCC	—	Power supply pin (+5 V)
9							O	Amp mute signal output
		AMP ATT
10					E2PSIO		I/O	EEPROM data signal input/output
11			E2PCKO				O	EEPROM clock signal output
12	DOOR SW/FLS SI						I	Door switch signal input (L: close) Flash write data signal input
13					FLS SO		O	Flash write data signal output
14							O	BUS ON control signal output
				BUS ON
15						BEEP	O	Beep signal output
16	NS MASK						O	Tuner mute signal output
17						UNISI	I	SONY BUS data signal input
18					UNISO		O	SONY BUS data signal output
19			UNICKO				O	SONY BUS clock signal output
20		IFWIDTH					O	Not used. (Open)
21		SWSHIFT					O	Not used. (Open)
22							O	System reset signal output
					SYSRST
23						(NCO)	O	Not used. (Open)
24						SIRCS	I	Remote control data signal input
25 – 29						NCO	O	Not used. (open)
30					AMPON		O	Amp on signal output (L: OFF/H: ON)
31							O	Electronic volume mute signal output (L: Mute on)
			VOLATT
32						NCO	O	Not used. (Open)
33						VSS	—	Ground pin
34						C	—	Power stabilized capacitance pin Not used. (open)
35 – 37						NCO	O	Not used. (Open)
38						DVCC	—	D/A converter VREF input
39						DVSS	—	D/A converter GND pin
40, 41						(NCO)	O	Not used. (Open)
42						AVCC	—	Analog power supply pin (+5 V)
43						AVRH	—	A/D converter VREF+ input
44						AVRL	—	A/D converter VREF– input
45						AVSS	—	Analog ground pin
46					KEYIN0		I	Key signal input 0
47					KEYIN1		I	Key signal input 1
48					RCIN0		I	Rotary commander signal input
49						NCO	O	Not used. (Open)
50	QUALITY						O	Quality signal output
51				FM AGC			O	Not used in this set. (Open)
52						MPTH	O	MPTH signal output to RDS decoder
53						VSM	I	S-meter signal input
54						VCC	—	Power supply pin (+5 V)
55, 56						NCO	O	Not used. (Open)
57							O	Display microcomputer write control signal output
						BOOT
58	DOORIND						O	Front panel indicator signal output
59 – 62						NIL	I	Not used. (Connect to ground in this set.)
63						VSS	—	Ground pin
64						NIL	I	Not used. (Connect to ground in this set.)
65					FSW IN		O	Not used. (Open)
66 – 68						NCO	O	Not used. (Open)

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