Sony CDX-MP40 service manual IC801 MN101C49KSJ SYSTEM CONTROL MAIN BOARD

CDX-MP40

• IC801 MN101C49KSJ (SYSTEM CONTROL) (MAIN BOARD)

Pin No.		Pin Name					I/O	Pin Description
1					VREF–		—	Power supply pin for A/D converter
2						VSM	I	S-meter voltage detection signal input from the tuner unit (TU601)
3						NIL	I	Not used. (Connected to ground.)
4			KEYIN1				I	Key signal input
5			KEYIN0				I	Key signal input
6				RC_IN0			I	Rotary commander key signal input from the remote-in jack
7		QUALITY					I	Noise detection signal input (AEP, UK model)/Connected to ground. (US, Canadian model)
8		DST SEL					I	Destination setting pin (US, Canadian model)
9						NIL	I	Not used. (Connected to ground.)
10					VREF+		—	Power supply pin for A/D converter
11						VDD	—	Power supply pin
12		OSCOUT					O	High speed clock output (18.43 MHz)
13						OSCIN	I	High speed clock input (18.43 MHz)
14						VSS	—	Ground pin
15						XIN	I	Low speed clock input (32.768 kHz)
16						XOUT	O	Low speed clock output (32.768 kHz)
17				MMOD			—	Memory mode selection input “L”: single chip mode (connected to ground)
18				LCDSO			O	Serial data output to the LCD driver
19				LCDCE			O	Chip enable signal output to the LCD driver
20		LCDCKO					O	Serial clock output to the LCD driver
21 – 23						NCO	O	Not used. (Open)
24							O	System reset signal output
			SYSRST
25							O	Bus on signal output to the bus interface
				BUSON
26		KEYACK					I	Key acknowledge detection signal input
27	DAVN (NIL)						I	RDS data block sync detection signal input (AEP, UK model)/Connected to
								ground. (US, Canadian model)
28						BU_IN	I	Back up power supply detection signal input
29						SIRCS	I	Remote control signal input from the remote control receiver
30		TUATT IN					I	ATT control signal input from tuner unit.
31						NIL	I	Not used. (Connected to ground.)
32						NIH	I	Not used. (Connected to power supply.)
33							I	Microcomputer reset signal input from the reset IC
					RESET
34							I	Front panel with/without detection signal input “L”: panel with
		NOSE SW
35						BEEP	O	Beep signal output to the power amplifier
36						NCO	O	Not used. (Open)
37							I	Test mode detection signal input
				TESTIN
38							I	Accessory power supply detection signal input
						ACCIN
39						NCO	O	Not used. (Open)
40			TELATT				I	TEL ATT detection signal input
41						NIH	I	Fixed at “H”.
42				BUSSO			O	Sony_Bus serial data output to the bus interface IC
43						BUSSI	I	Sony_Bus serial data input from the bus interface IC
44		BUSCKO					O	Sony_Bus serial clock output to the bus interface IC
45					I2CSIO		I/O	I2C bus serial data input/output
46						NCO	O	Not used. (Open)
47			I2CCKO				O	I2C bus serial clock output
48						NCO	O	Not used. (Open)
49						NCO	O	Not used. (Open)
50		POW_ON					O	System power supply control signal output
51 – 66						NCO	O	Not used. (Open)
67						ATT	O	System ATT control signal output
68						NCO	O	Not used. (Open)

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