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HW-controlled power domains with automatic power-on request

  • US 9,727,114 B2
  • Filed: 09/25/2014
  • Issued: 08/08/2017
  • Est. Priority Date: 09/25/2014
  • Status: Active Grant
First Claim
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1. A hardware system comprising:

  • a hardware block comprising one or more hardware components;

    a hardware power controller configured to control one or more power domains of the hardware system, the one or more power domains comprising a power domain of the hardware block; and

    a hardware interface configured to;

    receive at least one message for the hardware block;

    store the at least one message;

    in response to receiving the at least one message for the hardware block, activate a power request from the hardware interface to the hardware power controller to thereby request that the power domain of the hardware block be powered up, wherein the hardware power controller is configured to power up the power domain of the hardware block in response to activation of the power request from the hardware interface and the hardware block is configured to, in response to the power domain of the hardware block being powered up, activate a power request from the hardware block to the hardware power controller to thereby request that power to the hardware block be maintained until the power request from the hardware block is de-activated;

    receive an indication from the hardware block that the hardware block is ready to accept messages from the hardware interface; and

    provide the at least one message to the hardware block in response to receiving the indication from the hardware block that the hardware block is ready to accept messages from the hardware interface.

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