Nxp Usa, Inc.

Kamel Musa Khalaf

Thomas Henry Luedeke

Anurag Jindal

Stefan Doll

Nikila Krishnamoorthy

Joel Ray Knight

Hubert Glenn Carson, Jr

Hilario Manuel Garza

Adrian Lee Carleton

A fully digital integrated circuit apparatus () and method () are provided for generating a test mode enable signal with a digital non-resettable state retention storage circuit () connected to store an authentication control pattern for authorizing test mode access to a secure circuit, a digital safety interlock gate circuit () connected to store a safety interlock gate setting that may be accessed independently from a test mode enable signal, and combinatorial logic circuitry () for generating the test mode enable signal only when the interlock safety gate setting is set to a first value and the digital non-resettable state retention storage circuit stores the authentication control code.

Method and apparatus for digital only secure test mode entry

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Austin, TX, United States of America

Kamel Musa Khalaf