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US 10,705,594 B2Granted
Power management system
AssigneeIntel Corporation
InventorAmit Kumar Srivastava
Life of this patent
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Abstract
A Universal Serial Bus 2.0 (USB2 or eUSB2) device includes an integrated circuit (IC) having a physical layer to send and receive data on a pair of signal lines, a repeater communicatively coupled to the physical layer via the pair of signal lines, and having a port to send and receive data on a second pair of signal lines and a power management unit to provide power to the physical layer and the repeater during an active state and to gate power to the physical layer and the repeater during a low power state.
Claims25
A Universal Serial Bus 2.0 (USB2) device, comprising:
- an integrated circuit (IC) having a physical layer to send and receive data on a pair of signal lines;
- a repeater communicatively coupled to the physical layer via the pair of signal lines, and having a port to send and receive data on a second pair of signal lines;
- and
- a power management unit to provide power to the physical layer and the repeater during an active state after the physical layer and the repeater perform a configuration process that includes the repeater announcing its presence to the physical layer and both the repeater and the physical layer performing a top down configuration and to gate power to the physical layer and the repeater during a low power state from which the repeater and physical layer exit in response to a wake detect or a detection of a dual role device (DRD).
1 more element
A method, comprising:
- a power management unit providing power to a physical layer and a repeater during an active state after the physical layer and the repeater perform a configuration process that includes the repeater announcing its presence to the physical layer and both the repeater and the physical layer performing a top down configuration;
- the power management unit gating power to the physical layer and the repeater upon entrance of the low power state while operating in the active state;
- and
- the repeater and physical layer exiting the low power state in response to a wake detect or a detection of a dual role device (DRD).
1 more element
Dependencies are inferred from the claim text.