Eiki LC-NB3E service manual IIC Bus I/O Expander IC1851 Port Functions

Control Port Functions

●IIC Bus I/O Expander (IC1851) Port Functions

Pin No.	Name	Function	Action	I/O
1	S	Reset	Open	-
2	SCL	IIC SCL	Active “L”	-
3	SDA	IIC SDA	Active “L”	-
4	D0	CARD_IN	L: CARD H: No CARD	IN
5	D1	VIEWER_ON	L: VIEWER Unit exist	IN
6	D2	SCDT1	DVI Sync. detection H: DVI	IN
7	D3	TURBO_LED	H: on L: off	OUT
8	VSS	GND	-	-
9	D4	WARNING_LED	H: on L: off	OUT
10	D5	LAMPREP_LED	H: on L: off	OUT
11	D6	READY_LED	H: on L: off	OUT
12	D7	Not used	Fixed “L”	OUT
13	VDD	5 V	Vcc	-
14	CS2	Chip Select 2	Fixed “L”	-
15	CS1	Chip Select 1	Fixed “L”	-
16	CS0	Chip Select 0	Fixed “H”	-

●IIC Bus I/O Expander (IC2181) Port Functions

Pin No.	Name	Function	Action		I/O
1	S	Reset	Open		-
2	SCL	IIC SCL	Active “L”		-
3	SDA	IIC SDA	Active “L”		-
4	D0	MOD 2	Composite NTSC4.43, PAL60: H else: L		OUT
5	D1	MOD 1	Fixed “L”		OUT
6	D2	PNR	NTSC, NTSC4.43: L else: H		OUT
7	D3	NTPL 2	PAL-M, PAL-N: H	else: L	OUT
8	VSS	GND	-		-
9	D4	NTPL 1	PAL, PAL-N: H	else: L IN
10	D5	4.43 TRAP	Composite SECAM, NTSC4.43, PAL60: L, else: H		OUT
11	D6	C -SWIN	Component signal detection (L: Component)		IN
12	D7	S _ SW	S signal detection (L: S-Input)		IN
13	VDD	5 V	Vcc(5V)		-
14	CS2	Chip Select 2	Fixed “L”		-
15	CS1	Chip Select 1	Fixed “L”		-
16	CS0	Chip Select 0	Fixed “L”		-

●IIC Bus DA Converter (IC1831) Port Functions

Pin No.	Name	Function	Action
1	R	Reset	Fixed “H”
2	SCL	IIC SCL	Active “L”
3	SDA	IIC SDA	Active “L”
4	AO7	FAN_CONT_1	0xFFh:Min	0x00h:Max
5	AO8	FAN_CONT_2	0xFFh:Min	0x00h:Max
6	AO9	EDIDEN	L: H8 side	H: PC side
7	AO10	AUDIOMUTE	L: Mute Off	H: Mute On
8	AO11	PWRDN0	AD Power down (L:DVI/MCI H:PC)
9	AO12	DCOM_OFF	Digital Comb Filter Usage L: at composite SECAM, NTSC4.43, PAL60
10	VrefL		D/A converter lower ref. voltage Connect to GND
11	VrefU1		D/A converter upper ref. voltage (CH7~CH12) Vcc
12	GND	GND	GND
13	VrefU2		D/A converter upper ref. voltage (CH1~CH6) Vcc
14	AO1	VOL_CNT	Control sound output volume, L: minimum
15	AO2	CG1_CG2	L: CG1, H: CG2
16	AO3	MOUSE	Air mouse On/Off H: On L: Off
17	AO4	MOUSE_RESET	Air mouse CPU reset Reset start: H->L->H
18	AO5	TURBO +	Turbo motor control (+) L: On
19	AO6	TURBO -	Turbo motor control (-) L: On
20	Vcc	Digital power supply
21	Vdd	Analog power supply
22	CS2	Chip Select 2	Fixed “H”
23	CS1	Chip Select 1	Fixed “H”
24	CS0	Chip Select 0	Fixed “L”

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