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Stress test mode entry at power up for low/zero power memories

  • US 6,081,466 A
  • Filed: 10/30/1998
  • Issued: 06/27/2000
  • Est. Priority Date: 10/30/1998
  • Status: Expired due to Term
First Claim
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1. A memory device, comprising:

  • a memory array for storing information, the memory array including operational circuits for controlling wordline and column activation;

    means for placing the memory device into a deselect mode of operation wherein the operational circuits needed for wordline and column activation are disabled until an external pin application of a memory device supply voltage exceeds a first threshold; and

    a test mode circuit for detecting test mode activation when a voltage appearing on a test pad of the memory device exceeds a second threshold and then overriding the deselect mode of operation to activate the wordline and column related operational circuits at memory device power up such that the device powers up with multiple wordlines and columns activated and ready for application of a stress test overvoltage.

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