Sony MZ-N1 service manual Not used

MZ-N1

•IC801 CXD2677-202GA (SYSTEM CONTROLLER, DIGITAL SIGNAL PROCESSOR, 16M BIT D-RAM)

Pin No.	Pin Name	I/O			Description
1	NC	O	Load address strobe signal output terminal for D-RAM				Not used
2	NC	I	Test input terminal for D-RAM	Not used
3 to 7	NC	O	Address signal output terminal for D-RAM			Not used
8, 9	NC	I/O	Two-way data bus terminal for D-RAM		Not used
10, 11	DRAMVDD0, 1	—	Power supply terminal (for D-RAM) (+2.2V)
12, 13	DRAMVSS0, 1	—	Ground terminal (for D-RAM)
14, 15	NC	I/O	Two-way data bus terminal for D-RAM		Not used
16 to 19	NC	O	Address signal output terminal for D-RAM			Not used
20	NC	O	Column address strobe signal output terminal for D-RAM Not used
21	NC	I	Test input terminal for D-RAM	Not used
22, 23	NC	O	Address signal output terminal for D-RAM			Not used
24	DVSS0	—	Ground terminal (for the DSP block)
25	DVDD0	—	Power supply terminal (for the DSP block) (+1.1V)
26	OFTRK	I	Off track signal input from the DSP monitor (3)
27	SSB DATA	I/O	SSB data input/output with the RF amplifier
28	SSB CLK	O	SSB clock output to the RF amplifier
29	VREC PWM	O	PWM signal output for the Over write head drive power supply voltage control to the power
			control
30	VL PWM	O	PWM signal output for the laser power supply voltage control to the power control
31	VC PWM	O	PWM signal output for the system power supply voltage control to the power control
32	VD PWM	O	VD power supply voltage control signal output to the DC/DC converter
33	NC	—	Not used
34	IFVDD0	—	Power supply terminal (for the microcomputer I/F block) (+1.7V)
35	IFVSS0	—	Ground terminal (for the microcomputer I/F block)
36	OPT DET	I	DIN plug detection signal input terminal		“H”: DIN plug detect
37	XJACK DET	I	LINE IN plug detection signal input terminal			“L”: LINE or OPT plug detect
38	XMIC DET	I	Microphone plug detection signal input terminal “L”: microphone plug detect
39	OPEN CLOSE	I	Open/close detection switch of the upper panel input terminal
	SW		“L”: when upper panel close
40	SET CODE0	I	Input terminal for the set (fixed at “L” in this set)
41	SET CODE1	I	Input terminal for the set (open in this set)
42, 43	SET CODE1, 2	I	Input terminal for the set (fixed at “L” in this set)
44	XPATCH	I	Patch function detection terminal	“L”: patch function			Not used
45	SI0	I	Serial data input from the nonvolatile memory and liquid crystal display element module
46	SO0	O	Serial data output to the nonvolatile memory, A/D converter and liquid crystal display element
			module
47	SCK0	O	Serial clock signal output to the nonvolatile memory, A/D converter and liquid crystal display
			element module
48	XGUM ON	I	Rechargeable battery detection switch input terminal				“L”: rechargeable battery in detect
49	BEEP	O	Beep sound control signal output to the headphone amplifier
50, 51	TEST1, TEST0	I	Input terminal for the main test (normally fixed at “L”)
52	KDO	O	Data output terminal Not used
53	KRB	I	Ready/busy signal input terminal	Not used
54	KCLK	O	Clock signal output terminal Not used
55	KCS	O	Chip select signal output terminal	Not used

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