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DS90UH927Q register of HDCP ISR

Kei Sato73562
Expert 2310 points

Hello,

Please tell me "IS_AUTH_FAIL" of DS90UH927Q register.

After having authenticated HDCP, an interrupt of the HDCP authentication failure occurs when I change it to analog pictures such as AUX. (IS_AUTH_FAIL: 0xC7,bit2)

Why will an interrupt of the HDCP authentication failure occur?

Please tell me the condition that an interrupt of the HDCP authentication failure produces.

  • 0
    TI__Genius 14015 points

    Hello,

    The authentication fail bit will normally get set when after authentication is initiated, and the keys are not determined to be valid. 

    When you are getting this interrupt flag, is the video still being output at the deserializer? A normal 'authentication fail' condition would result in an encrypted video output at the deserializer.

    Thanks,
    Jason