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/27h - Philips SAA7110(A) ONE-CHIP FRONT-END - GAIN CONTROL ANALOG #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 Gain Control Analog #1: Bit(s) Description (Table I0088) (Table I0089) 7 automatic gain control integration hold 6 AGC integration mode (=0 difference value, =1 fix value) 5-0 static gain control channel 2 decimal gain multiplier (.19 dB step) 0 -2.82 dB 15 0.0 dB 31 3.0 dB 47 6.0 dB 63 9.0 dB