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. 9Ch/22h - Philips SAA7110(A) ONE-CHIP FRONT-END - MIXER CONTROL #1 Access: Write-Only 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. 9Eh Bitfields for Mixer Control #1: Bit(s) Description (Table I0088) (Table I0087) 7-6 automatic gain control 00 OFF 01 channel 2 10 channel 3 11 channel 4 5 Chrominance select 0 ADC 3 to CHR 1 ADC 2 to CHR 4 Luminance select 0 ADC 2 to CVBS 1 ADC 3 to CVBS 3 fast digital multiplexing channel 2/3 active 0 normal CHR channel setting 1 used only for testing - do not use 2 clamping function test 0 normal clamping mode 1 used only for testing - do not use 1-0 analog MUX3 control 00 adder mode 01 Ch 3 ON, Ch 4 OFF 10 Ch 3 OFF, Ch 4 ON 11 both channels OFF