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Selectively disabled output

  • US 9,755,650 B1
  • Filed: 06/16/2016
  • Issued: 09/05/2017
  • Est. Priority Date: 05/16/2006
  • Status: Active Grant
First Claim
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1. An integrated circuit device, comprising:

  • a storage circuit that stores first data;

    a device package comprising a first power supply pin and a second power supply pin;

    a first power supply pad electrically coupled to the first power supply pin;

    a second power supply pad electrically coupled to the second power supply pin, wherein the integrated circuit device operates using electrical power received when a first voltage is applied to the first power supply pin and a second voltage is applied to the second power supply pin;

    an input pad selectively connected affixedly to one of the first power supply pin and the second power supply pin; and

    a readout circuit communicatively coupled to the storage circuit and electrically coupled to the input pad via a first circuit line, wherein the readout circuit;

    enables readout of the first data from the integrated circuit device when the input pad is electrically connected affixedly to the second power supply pin and the second voltage is applied to the input pad via the second power supply pin; and

    disables the readout of the first data from the integrated circuit device when the input pad is electrically connected affixedly to the first power supply pin and the first voltage is applied to the input pad via the first power supply pin, wherein the integrated circuit device does not operate properly when the second voltage is supplied to the first power supply pin to facilitate preventing readout of the first data from the integrated circuit device while the input pad is electrically connected affixedly to the first power supply pin.

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