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AM5718: If the clock from the external 32768Hz crystal for internal RTC can be used by other internal modules?

Part Number: AM5718


Tool/software:

HiJosue

    As stated in the title, I need your help to confirm this.

    Thanks.

Best,

Jiazhe

  • Prior thread with context is here:

      AM5718: Frequency calibration for 20M crystal oscillator 

    Can you summarize your intended use case?  Why do you want to source other IP from the 32kHz crystal input?

    Thanks,

    Kyle

  • Hi Kyle,

        I just want to confirm this.

        Due to confidentiality reasons, I cannot say too much. My competitors said that he could use the  the external 32kHz crystal to make the system clock more accurate, so my customers also think so.  

        I read the AM571x TRM and datasheet, but get nothing I want. I am very confused about how he did it. So, I just want to get the right answer from you and prove this issue to my customers.

    Thanks.

    Best,

    Jiazhe

  • Hi Kyle,

        I read the linux kernel and only find that the RTC module can use either the external 32kHz crystal or the On-die 32K RC oscillator.

        There is no code description for the issue indicated in the title.

    Thanks.

    Best,

    Jiazhe