I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo.	 The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM).  The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus.	 Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 86h/33h - ITT VPX 32xx - Input Selector
SeeAlso: I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo.	 The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM).  The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus.	 Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah/33h


Bitfields for VDP 3108/VPX 32xx input selector:
Bit(s)	Description	(Table I0032)
 1-0	luma ADC select
	00 VIN3
	01 VIN2
	10 VIN1
	reserved
 2	chroma ADC select
	0 VIN1
	1 CIN  (dedicated S-VHS chroma input)
 3	clamping for chroma A/D converter
 4	(VDP3108 only) internal/external luma ADC clamp enable
 5	reserved
 6	(VPX32xx only) stand-by luma ADC
 7	(VPX32xx only) stand-by chroma ADC