Sony MDS-NT1 service manual Main Board IC301 M30835FJGP-01 System Controller

MDS-NT1

•MAIN BOARD IC301 M30835FJGP-01 (SYSTEM CONTROLLER)

Pin No.	Pin Name		I/O				Description
1	NC		—	Not used
2	RMC		I	Remote control signal input terminal		Not used
3	NETMD_SO		O	Serial data output to the USB interface IC
4	NETMD_SI		I	Serial data input from the USB interface IC
5	NETMD_CLK		O	Serial data transfer clock output to the USB interface IC
6	BYTE		I	External data bus line byte selection signal input					“L”: 16 bit, “H”: 8 bit (fixed at “L”)
7	CNVSS		—	Not used
8, 9	NC		—	Not used
10	S.RESET		I	System reset signal input terminal “L”: reset
				For several hundreds msec. after the power supply rises, “L” is input, then it change to “H”
11	XOUT		I	System clock input terminal (10 MHz)
12	VSS		—	Ground terminal
13	XIN		O	System clock output terminal (10 MHz)
14	VCC		—	Power supply terminal (+3.3V)
15	NMI		I	Non-maskable interrupt input terminal		Not used
16	DQSY		I	Digital In U-bit CD format subcode Q sync (SCOR) input terminal
				“L” is input every 13.3 msec	Almost all, “H” is input
17	P.DOWN		I	Power down detection signal input terminal
20	SQSY		I	Subcode Q sync (SCOR) input terminal
				“L” is input every 13.3 msec	Almost all, “H” is input
19 to 22	NC		—	Not used
23	XINT		I	Interrupt status input from the mechanism deck section
24 to 26	NC		—	Not used
27	I2C_CLK		I/O	Communication data reading clock signal output terminal						Not used
28	I2C_DATA		I/O	Communication data bus input/output terminal				Not used
29	SWDT		O	Writing data output to the mechanism deck section and the D/A converter
30	SRDT		I	Reading data input from the mechanism deck section
31	SCLK		O	Serial data transfer clock signal output to the mechanism deck section and the D/A converter
32	RTSI		—	Not used
33 to 35	NC		—	Not used
36	MUTE		O	Audio line muting control signal output terminal					“L”: line muting on
37	ADA_RESET		O	Reset signal output to the D/A converter			“L”: reset
38	ADA_LATCH		O	Serial data latch signal output to the D/A converter					“L”: reset
39	EPM		—	Not used
40, 41	NC		—	Not used
42	MOD		O	Laser modulation select signal output terminal				Stop: “L”		Playback power: “H”
				Recoding power: “H” pulse is inputted in a cycle of 2 seconds
43	LDON		O	Laser diode on/off control signal output to the automatic power control circuit
				“H”: laser diode on
44		CE	I	Command chip enable signal output to the D-RAM
45	LIMIT-IN		I	Detection input from the sled limit-in detect switch (S101)
				The optical pick-up is inner position when “L”
46	WRPWR		O	Laser power select signal output terminal			“L”: playback mode, “H”: recording mode
47	REC-SW		I	Detection input from the recording position detect switch						“L”: active
48	ADA_RESET		O	Reset signal output to the mechanism deck section					“L”: reset
49	SENSE		I	Internal status (SENSE) signal input to the mechanism deck section

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