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Debug port disable mechanism

  • US 7,117,352 B1
  • Filed: 12/20/2002
  • Issued: 10/03/2006
  • Est. Priority Date: 02/13/2002
  • Status: Expired due to Fees
First Claim
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1. A circuit comprising:

  • a debug port; and

    a processor configured to (i) bootstrap to a first memory while in a highest mode of security, (ii) disable said debug port while in said highest mode of security, (iii) authenticate said debug port, (iv) disable said debug port before transitioning to an intermediate mode of security in response to failing said authentication and (v) enable said debug port while in a lowest mode of said security.

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