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Single wire serial interface utilizing count of encoded clock pulses with reset

  • US 9,247,607 B2
  • Filed: 10/15/2014
  • Issued: 01/26/2016
  • Est. Priority Date: 03/28/2002
  • Status: Expired due to Fees
First Claim
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1. A power integrated circuit for controlling a light source, the power integrated circuit comprising:

  • a counter that generates a count value based on pulses encoded in a signal received at a single input of the power integrated circuit;

    output circuitry that outputs, via at least one output of the power integrated circuit, at least one lighting control state utilized to control the light source based at least in part on the count value; and

    sensing circuitry that determines whether the signal is high or low so that (i) the at least one lighting control state is maintained while the signal is high, and (ii) the count value is reset in response to the signal being low for a period that exceeds a predetermined timeout value, the predetermined timeout value being longer than a width of one of the pulses.

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