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SN65DP159: About signal detector circuit result

user5163865
Genius 3990 points
Part Number: SN65DP159


Tool/software:

Hi Vishesh-san,

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1402734/sn65dp159-about-signal-monitor-functions/5370918#5370918

Please tell me a bit more about the second question in the above thread.
In your answer, "This is an internal signal detection circuit which is based on the PLL status in the retimer", what kind of signal does "internal signal detection" specifically detect?

I'm sorry for repeating the same question.

Best regards,
Hiroshi

  • 0
    TI__Mastermind 41601 points

    Hey Hiroshi-san,

    No problem! Typically the DP159 looks to see if a signal is present across the RX pins of the device. In the typical application the DP159 is used as a DP++ to HDMI level shifter. The signal detector circuit is most likely a PLL that latched onto a frequency that is within the link specification. Once that PLL is latched the internal signal detection flag is raised and the output links are enabled.

    I can look further into this, but this will require more time as I will need to consult our design team. Is the explanation provided sufficient?

  • 0 in reply to Vishesh Pithadiya
    Genius 3990 points

    Hi Vishesh-san,

    Thank you for your detailed reply. I will reply to my customer and come back here.

    Hiroshi

  • 0 in reply to user5163865
    Genius 3990 points

    Hi Vishesh-san,

    This inquiry has been resolved with the customer's understanding.
    Thank you for your detailed and prompt response.

    Best regards,
    Hiroshi