Sony CDX-605 IC PIN Function Description, Main Board IC302 CXP84124-078Q System Controller

7-8. IC PIN FUNCTION DESCRIPTION

•MAIN BOARD IC302 CXP84124-078Q (SYSTEM CONTROLLER)

Pin No.	Pin Name		I/O					Function
1	LIM.SW		I	Sled limit in detect switch (SW1) input terminal
				“L”: When the optical pick-up is inner position
2	BUSON		I	Bus on/off control signal input from the SONY bus interface (IC204)						“H”: bus on
3	EJECT		I	Eject switch (SW303) input terminal				“H” active
4	LOAD1		I	Save end detect switch (SW12) input terminal
				“L”: When completion of the disc chucking operation
5	LOAD2		I	Chucking end detect switch (SW11) input terminal
				“L”: When completion of the disc chucking operation
6	A.MUTE		O	Audio line muting on/off control signal output terminal “H”: muting on
7	EMPH		O	Emphasis mode output to the D/A converter (IC401) “L”: emphasis on
8	CH.R		O	Motor drive signal (save direction) output to the chucking motor drive (IC52)
				“H” active		*1
9	CH.F		O	Motor drive signal (load chucking direction) output to the chucking motor drive (IC52)
				“H” active		*1
10		—	O	Not used (open)
11	ELV.R		O	Motor drive signal (elevator down direction) output to the elevator motor drive (IC301)
				“L” active		*2
12	ELV.ON		O	Mechanism deck section power supply on/off control signal output						“H”: power on
13	CD RST		O	System reset signal output to the CXA1992AR (IC11), CXD2530Q (IC101) and SM5852FS
				(IC102)	“L”: reset
14	CDON		O	D/A converter and servo section power supply on/off control signal output “H”: power on
15 to 23		—	O	Not used (open)
24	AUTO ON/OFF		I	Setting terminal for the automatic adjustment					“L”: automatic adjustment, “H”: manual
				adjustement (solder across the BP302 terminal)					Normally: fixed at “L”
25 to 29		—	O	Not used (open)
				System reset signal input from the reset signal generator (IC202) and SONY bus interface
30	RESET		I	(IC204)	“L”: reset
				For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
31	EXTAL		I	Main system clock input terminal (8 MHz)
32	XTAL		O	Main system clock output terminal (8 MHz)
33	VSS		—	Ground terminal
34		TX	O	Sub system clock output terminal			Not used (open)
35	TEX		I	Sub system clock input terminal			Not used (fixed at “L”)
36	AVSS		—	Ground terminal (for A/D converter)
37	AVREF		I	Reference voltage (+5V) input terminal (for A/D converter)
38	ATRIBT		I	Selection input of the custom file, D-BASS, etc.
39	MCK		I	Input of signal for the fine adjustment (linear position sensor adjustment; RV301) of elevator
				position (A/D input)
40	EHS		I	Elevator height position detect input from the RV302 (elevator height sensor) (A/D input)
41	H.TEMP		I	High temperature sensor input terminal				Not used (open)
42		—	O	Not used (open)
43	MODE1		O	D-BASS control signal output to the SM5852FS (IC102)
44	MODE2		O	D-BASS control signal output to the SM5852FS (IC102)
45	MODE3		O	D-BASS control signal output Not used (open)
46, 47		—	O	Not used (open)
48	SCK		I	Serial data transfer clock signal input from the SONY bus interface (IC204)
49		SI	I	Serial data input from the SONY bus interface (IC204)

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