Patent ID: 7822898
Filing Date: 2010-10-26
Classification: H04L

Abstract:
1. A method of preventing a serial bus device from granting requests during one or more intervals of time, the method comprising: determining whether the serial bus device has the right to grant requests among a first set of serial bus devices; detecting the type of the serial bus; selecting a protocol based at least in part upon the detected type of the serial bus; and determining whether requests are presently allowed to be transmitted over the serial bus, wherein the determination is based at least in part upon the protocol; wherein a first protocol allows the serial bus device to grant requests after receiving one of either (a) a first signal indicating the end of an isochronous packet or (b) a second signal indicating the end of an asynchronous packet and the end of a subaction has been detected; and wherein the first protocol prohibits the serial bus from granting requests during an interval of time if the serial bus receives either (a) a third signal indicating the end of an asynchronous packet and the end of a subaction has not been detected or (b) a fourth signal indicating the end of an asynchronous packet and an acknowledgement has not been detected over the serial bus.