Sony MDX-C5970R Keyack, Seekout, Sd-In, Pll Ce, Pow-Sel, Lcd Ce, Flash-W, RE-IN0, RE-IN1, ILL on

Pin No.	Pin Name		I/O				Function
75		NC	O	Not used (open)
76		BU-IN	I	Battery detect signal input from the SONY bus interface (IC600) and battery detect circuit
				“L” is input at low voltage
77, 78		NC	O	Not used (open)
79	KEYACK		I	Input of acknowledge signal for the key entry				Acknowledge signal is input to accept function
				and eject keys in the power off status			On at input of “H”
80	TEL-ATT		I	Telephone muting signal input terminal			At input of “H”, the signal is attenuated by –20 dB
				Used for the MDX-C5970/C5970R only (MDX-C5960R: fixed at “H”)
				FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU1), or forced
81	ST-MONO		I/O	monaural control signal output to the FM/AM tuner unit (TU1)
				“L” is input in the FM stereo mode, or “L” is output in the forced monaural mode
				Seek control signal output to the FM/AM tuner unit (TU1)
82	SEEKOUT		O	AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM
				FM mode: Used for SD speed up at SEEK, BTM, or AF
				“L” is output at tuner off
83		SD-IN	I	Station detector detect input from the FM/AM tuner unit (TU1)
				Stop level for SEEK, BTM, etc. is determined				SD is present at input of “H”
84		MONO	O	Not used (open)
85		PLL CE	O	PLL serial chip enable signal output terminal				Not used (open)
86		HSTX	I	Hardware standby input terminal		“L”: hardware standby mode Reset signal input in this set
87		MD2	I	Setting terminal for the CPU operational mode (fixed at “L” in this set)
88		MD1	I	Setting terminal for the CPU operational mode (fixed at “H” in this set)
89		MD0	I	Setting terminal for the CPU operational mode (fixed at “H” in this set)
90		RESET	I	System reset signal input from the reset signal generator (IC801) and reset switch (S900)
				“L”: reset	“L” is input for several 100 msec after power on, then it changes to “H”
91		VSS	—	Ground terminal
92		X0	I	Main system clock input terminal (3.68 MHz)
93		X1	O	Main system clock output terminal (3.68 MHz)
94		VCC	—	Power supply terminal (+5V)
95	POW-SEL		I	Power select switch input terminal		“L”: off (halt mode), “H”: on (operation mode)
				Not used (open)
96	POL MONO		I	Polar monaural detection signal input terminal				Not used (open)
97 to 99		NC	O	Not used (open)
		BAND		Frequency select switch (S701) input terminal
100			I	“L”: MW10k step/FM 200k step, “H”: MW 9k step/FM 50k step
		(9K-10K)
				Used for the E model only (Except E models: fixed at “H”)
101		NC	O	Not used (open)
				Internal RAM reset detection signal input from the RN5VD23AA (IC802)
102		RAMBU	I	Input terminal to check that RAM data are not destroyed due to low voltage
				This checking is made within 100 msec after reset
103		NC	O	Not used (open)
104		LCD CE	O	Chip enable signal output to the liquid crystal display driver (IC801)					“H” active
105	FLASH-W		I	Internal flash memory data write mode detection signal input terminal					“L”: data write mode
				Not used (fixed at “H” in this set)
106		RE-IN0	I	Dial pulse input of the rotary encoder (EN801)
107		RE-IN1	I	(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
108	LAMP ON		O	Power on/off control signal output of the illumination LED and liquid crystal display driver
		(ILL ON)		(IC801)	“H”: power on
109		PW-ON	O	Main system power supply on/off control signal output to the BA3918 (IC800) “H”: power on
110		FM-ON	O	FM system power supply on/off control signal output to the BA3918 (IC800)
				“L”: AM power on, “H”: FM power on

– 70 –