Patent ID: 8386814
Filing Date: 2013-02-26
Classification: G06F,H02J

Abstract:
1. A method for continuously detecting when a USB client device may be charged according to a Battery Charging Specification (BCS) standard comprising: applying power from a USB host device to the USB client device without exceeding a current limit; initiating a procedure, the procedure comprising: monitoring data lines D+ and D− for a first part of a handshake from the USB client device wherein the first part of the handshake comprises: applying no communication on the data lines from the USB client device and the USB host device during a time period T applying a first voltage on the D+ data line during the time period T providing a second part of the handshake from the USB host device when the first part of the handshake is detected; completing the handshake; providing current from the USB host device to the USB client device according to the Battery Charging Specification (BCS) standard; repeating the procedure.