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/E8h - ITT VPX 32xx - Format 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. 86h/F0h,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/28h/1Bh


Bitfields for VPX 32xx format selector:
Bit(s)	Description	(Table I0038)
 2-0	video format
	000 YCbCr 4:2:2 or YCbCr 4:2:2 CCIR  (16 bits/pixel)
	001 YCbCr 4:4:4			     (24 bits/pixel)
	010 YCbCr 4:1:1			     (12 bits/pixel)
	011 YCbCr 4:4:4 DPCM compressed	      (8 bits/pixel)
	100 RGB(Red-Green-Blue) The color specification mechanism normally used in computer displays, where colors are separated into their primary-color components.  See also YUV. 8:8:8
	101 RGB(Red-Green-Blue) The color specification mechanism normally used in computer displays, where colors are separated into their primary-color components.  See also YUV. 8:8:8 (inverse gamma)
	110 RGB(Red-Green-Blue) The color specification mechanism normally used in computer displays, where colors are separated into their primary-color components.  See also YUV. 5:6:5 (inverse gamma)
	111 RGB(Red-Green-Blue) The color specification mechanism normally used in computer displays, where colors are separated into their primary-color components.  See also YUV. 5:5:5 (inverse gamma) + Alpha Key
 3	CbCr data stream format
	0 two's complement (-128..127)
	1 binary offset (0..255)
 4	contrast brightness, clamping level
	0 clamping level = 32
	1 clamping level = 16 (darker image)
 5	Gamma: round dither enable
 6	Alpha Key polarity (=0 active high, =1 active low)
	if the Alpha Keyer limits have been set to the maximum limits
	  (default), then the Alpha Key is always active, and this bit
	  controls the state of the ALPHA pin
	[on the 3214C, programmable output pin connected to TDO]
 7	Alpha Keyer median-of-3 filter enabled