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System for reducing dynamic power consumption of wakeup source

  • US 9,152,207 B2
  • Filed: 06/21/2012
  • Issued: 10/06/2015
  • Est. Priority Date: 06/21/2012
  • Status: Expired due to Fees
First Claim
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1. A system for receiving a data packet from a source device and transmitting the data packet to a destination device, comprising:

  • an input/output (I/O) pad for receiving the data packet from the source device;

    a wakeup source, coupled to the I/O pad, for processing the data packet, wherein the wakeup source initiates a wakeup sequence when the data packet includes a predetermined code, and transmits the data packet to the destination device;

    clock gating logic, coupled to the wakeup source, for switching on the wakeup source when the I/O pad receives the data packet and switching off the wakeup source when the I/O pad is idle for a first predetermined time period; and

    at least one buffer circuit, coupled between the I/O pad and the wakeup source, for delaying transmission of the data packet to the wakeup source by a second predetermined time period, wherein the wakeup source is switched on within the second predetermined time period.

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