Patent ID: 6078319
Filing Date: 2000-06-20
Classification: G09G

Abstract:
A video controller integrated circuit constructed from an integrated circuit technology which may operate at multiple operating voltages, the video controller integrated circuit coupling to a switching circuitry for selectively supplying one of the multiple operating voltages to the video controller integrated circuit, the video controller circuit generally operating slower at lower operating voltages, said video controller integrated circuit comprising:a core circuitry for receiving video data from a video memory and processing the video data to produce video output data and for receiving a signal indicative of at least a resolution and a pixel depth for the video data, said core circuitry receiving a selected power supply voltage from the switching circuit;an output circuitry, coupled to said core circuitry, for receiving the video output data and generating a video output signal, said output circuitry receiving the selected power supply voltage from the switching circuit;a logic circuitry, coupled to said core circuitry, for receiving the signal indicative of at least a resolution and a pixel depth and outputting a logic level signal to the switching circuit indicative of a supply voltage sufficient to drive said core circuitry at the resolution and the pixel depth,wherein the switching circuitry is switched to output a minimum selected power supply voltage from the multiple operating voltages which will operate the video controller integrated circuit at the resolution and pixel depth indicated by the signal indicating the resolution and pixel depth.