USB self-idling techniques
First Claim
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1. A Universal Serial Bus (USB) device including a USB device controller configured to:
- communicate via a USB bus with a USB host capable of providing current to the USB device; and
present a first mode to the USB host and enter a second mode while presenting the first mode to the USB host by deactivating a clock device of the USB device, causing the USB device to ignore data packets communicated via the USB bus while in the second mode, and monitoring a power bus line of the USB bus effective to enable the USB device controller to detect a power cycle event on the USB bus.
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Abstract
USB self-idling techniques are described. In one or more embodiments, a Universal Serial Bus (USB) device comprises one or more modules to communicate via USB and self-idle by presenting an idle mode to a USB host and entering a suspend mode after the idle mode, the suspend mode being entered while the USB host is presented with the idle mode.
111 Citations
20 Claims
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1. A Universal Serial Bus (USB) device including a USB device controller configured to:
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communicate via a USB bus with a USB host capable of providing current to the USB device; and present a first mode to the USB host and enter a second mode while presenting the first mode to the USB host by deactivating a clock device of the USB device, causing the USB device to ignore data packets communicated via the USB bus while in the second mode, and monitoring a power bus line of the USB bus effective to enable the USB device controller to detect a power cycle event on the USB bus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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presenting, at a port of a Universal Serial Bus (USB) device, a first mode to a USB host; and causing the USB device to enter a second mode while presenting the first mode to the USB host, wherein; causing the USB device to enter the second mode includes deactivating a clock device of the USB device and causing the USB device to ignore data packets communicated via the USB while in the second mode. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification