Sony MZ-R900 service manual DSPVDD2

MZ-R900

Pin No.	Pin Name	I/O		Description
91	DSPVDD2	—	Power supply terminal (for DSP block) (+1.5V)
92	DSPVSS1	—	Ground terminal (for DSP block)
93	SPCU	I	Spindle motor drive comparison signal input (U) from the motor driver (IC551)
94	SPCV	I	Spindle motor drive comparison signal input (V) from the motor driver (IC551)
95	SPCW	I	Spindle motor drive comparison signal input (W) from the motor driver (IC551)
96	SRDR	O	Sled servo drive PWM signal output (–) to the motor driver (IC551)
97	SFDR	O	Sled servo drive PWM signal output (+) to the motor driver (IC551)
98	SLDV	O	Sled motor drive signal output (V) to the motor driver (IC551)/ drive control signal
			output (1–)
99	SLDW	O	Sled motor drive signal output (W) to the motor driver (IC551)/ drive control signal
			output (2+)
100	SLCU	I	Spindle motor drive comparison signal input (U) from the motor driver (IC551)
101	SLCV	I	Spindle motor drive comparison signal input (V) from the motor driver (IC551)
102	SLCW	I	Spindle motor drive comparison signal input (W) from the motor driver (IC551)
103	DIFVDD1	—	Power supply terminal (for DSP I/F) (+2.3V)
104	DIFVSS1	—	Ground terminal (for DSP I/F)
105	EFMO	O	EFM encode data output for the record to the over write head drive (IC601)
106	MNT0	O	Internal DSP monitor output (0) terminal		Not used (open)
107	MNT1	O	Internal DSP monitor output (1) terminal		Not used (open)
108	MNT2	O	Internal DSP monitor output (2) terminal		Not used (open)
109	MNT3	O	Internal DSP monitor output (3) terminal		Not used (open)
110	SENSE	O	Internal DSP (SENS) monitor output terminal Not used (open)
111	TX	O	Record data output enable signal output monitor terminal of the internal DSP
			Not used (open)
112	RECP	O	Laser power changeover signal output monitor terminal Not used (open)
113	DSPVDD3	—	Power supply terminal (for DSP block) (+1.5V)
114 to	NC	O	Output terminal for the external D-RAM		Not used (open)
117
118	DRAMVSS0	—	Ground terminal (for the external D-RAM)
119	DRAMVDD0	—	Power supply terminal (for the external D-RAM) (+2.4V)
120 to	NC	O	Output terminal for the external D-RAM		Not used (open)
138
139	DRAMVDD1	—	Power supply terminal (for the external D-RAM) (+2.4V)
140	DRAMVSS1	—	Ground terminal (for the external D-RAM)
141	TSB MST VDD	—	Power supply terminal (for TSB master communication) (+2.8V)
142	RMC DTCK	I/O	TSB serial data input/output with the remote commander attached headphone
143	TSB SLV VDD	—	Power supply terminal (for I/F to TSB slave communication) (+2.3V)
144	TSB SLVI	I	TSB slave signal input from the remote commander attached headphone
145	TSB SLVO	O	TSB slave signal output from the remote commander attached headphone
146	TDI	I	Data input terminal for JTAG	Not used (open)
147	TMS	I	Test mode control input terminal for JTAG		Not used (open)
148	TCK	I	Clock input terminal for JTAG	Not used (open)
149	XTRST	I	Reset input terminal for JTAG	Not used (open)
150	TDO	O	Data output terminal for JTAG	Not used (open)
151	JTAGVDD	—	Power supply terminal (for JTAG) (+2.4V)
152	JTAGVSS	—	Ground terminal (for JTAG)
153	MCUVDD2	—	Power supply terminal (for the microcomputer block) (+1.5V)
154	MIFVDD0	—	Power supply terminal (for the microcomputer I/F block) (+2.3V)
155	MIFVSS0	—	Ground terminal (for the microcomputer I/F block)

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