Texas Instruments Incorporated
POWER CONSUMPTION REDUCTION IN USB REDRIVERS AND REPEATERS

Abstract:

In an example, a data communication device includes one or more receivers, and one or more transmitters. The data communication device detects a start of frame packet (.mu.SOF) on a data bus, wherein the .mu.SOF indicates the start of a microframe; determines whether there are any data packets contained in the microframe during a first threshold period after the .mu.SOF; and detects that there is no data packet contained in the microframe during the first threshold period after the .mu.SOF, and in response, transitions at least one of the one or more transmitters from an active state to an OFF state, and transitions the at least one of the one or more transmitters from the OFF state to the active state prior to a switchback period before the end of the microframe.