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METHOD TO MINIMIZE THE NUMBER OF IRQ LINES FROM PERIPHERALS TO ONE WIRE

  • US 20150058507A1
  • Filed: 08/18/2014
  • Published: 02/26/2015
  • Est. Priority Date: 08/24/2013
  • Status: Active Grant
First Claim
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1. A master device, comprising:

  • a first interface to a single line interrupt request (IRQ) bus to which one or more slave devices are coupled;

    a second interface to a control data bus to which the one or more slave devices are also coupled; and

    a processing circuit coupled to the first interface and the second interface, the processing circuit adapted to;

    group the one or more slave devices into one or more groups, where each group is associated with a different IRQ signal;

    monitor the IRQ bus to ascertain when an IRQ signal is asserted by at least one slave device;

    identify a group with which the IRQ signal is associated; and

    scan the slave devices of the identified group to ascertain an asserting slave device which asserted the IRQ signal on the IRQ bus.

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