Patent ID: 7092041

Claim:
A video signal processing apparatus, comprising: an I 2 C bus having main I 2 C bus portion, a controller IC coupled to said main I 2 C bus portion, an auxiliary I 2 C bus portion having a plurality of auxiliary ICs connected thereto; and a switch interposed between said main I 2 C bus portion and said auxiliary I 2 C bus portion and in communication with said controller IC, said switch operative under control of said controller IC to selectively isolate said auxiliary I 2 C bus portion from said main I 2 C bus portion during a first operating mode of the apparatus, wherein said auxiliary ICs communicate with each other via said auxiliary I 2 C bus-portion at a first data transfer rate, and said switch operative under control of said controller IC to selectively couple said auxiliary I 2 C bus portion to said main I 2 C bus portion during a second operating mode of the apparatus, wherein said auxiliary ICs communicate with the controller IC via said auxiliary and main I 2 C bus portions at a second data transfer rate that differs from the first data transfer rate.