Sony service manual CDX-MP40 SECTION DIAGRAMS, Ic Pin Descriptions

CDX-MP40

SECTION 3

DIAGRAMS

3-1. IC PIN DESCRIPTIONS

• IC3 HD6432238RWN35TEI (CD MASTER CONTROL) (SERVO BOARD)

Pin No.	Pin Name					I/O		Pin Description
1						I	Test mode selection pin Not used. (Open)
				TEST
2	DECXRST					O	Reset signal output to the DSP IC		“L”: reset
3	DECSTBY					O	Standby mode control signal output to the DSP IC “H”: standby
4 – 7					NC	O	Not used. (Open)
8					PH3	I	CD PH3 photo sensor detection signal input			Not used. (Open)
9	INSW/PH2					I	CD mechanism disc in switch detection signal input
10						I	CD mechanism in-limit switch detection signal input
	LIMIT_SW
11						I	CD mechanism down switch detection signal input
			D_SW
12			CVCC			—	System power supply pin (+3.3 V)
13					NC	O	Not used. (Open)
14					VSS	—	Ground pin
15					NC	O	Not used. (Open)
16						I	CD PH1 photo sensor detection signal input			Not used. (Open)
					PH1
17		EJECT				O	CD mechanism loading motor control signal output (eject operation)
18			LOAD			O	CD mechanism loading motor control signal output (load operation)
19 – 26					NC	O	Not used. (Open)
27			FLAG			I	Correction unable detection signal input
28			RFOK			I	RFOK signal input from the servo IC
29, 30					NC	O	Not used. (Open)
31				TXD		O	UART TXD PC connection output		Not used. (Open)
32				RXD		I	UART RXD PC connection input		Not used. (Open)
33		XTALEN				O	Crystal oscillation control signal output to the servo IC
34				TSTB		O	CD text parameter strobe signal output to the servo IC
35					STB	O	Data strobe signal output to the servo IC
36					A0	O	Command/parameter identification signal output to the servo IC
							“L”: command, “H”: parameter
37		CD_RST				O	Reset signal output to the servo IC
38						I	CD text pack sync signal input from the servo IC
				PACK
39					NC	O	Not used. (Open)
40						I	CD mechanism self load position detection switch signal input
		SELF_SW
41					NC	O	Not used. (Open)
42				AVSS		—	Ground for A/D converter
43, 44					NC	O	Not used. (Open)
45, 46					NC	I	Not used. (Open)
47				KEY0		I	Key switch signal input in the test mode Not used. (Open)
48				KEY1		I	Mode switch signal input in the test mode			Not used. (Open)
49 – 52					NC	I	Not used. (Open)
53		AVREF				—	Reference voltage for A/D converter
54			AVCC			—	Power supply for A/D converter
55				MD0		—	CPU operation mode setting pin		Connecting to +3.3 V in this set.
56				MD1		—	CPU operation mode setting pin		Connecting to +3.3 V in this set.
57				X1A		—	Sub clock oscillator terminal	Not used. (Open)
58				X0A		—	Sub clock oscillator terminal	Not used. (Open)
59				RSTX		I	Microcomputer reset signal input
60				NMI		—	Not used. (Fixed at “H”)
61				STBY		—	Not used. (Fixed at “H”)
62				VCC		—	Power supply pin (+3.3 V)
63			XTAL			—	Main clock oscillator pin (12.288 MHz)
64					VSS	—	Ground pin
65		XTEAL				—	Main clock oscillator pin (12.288 MHz)
66				FWE		I	Flash write enable signal input

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