i.MX RT1170 external input clock requirements

Eugene3 · ‎10-02-2023

I'm designing RT1170 application and planning to use an external oscillator for 24MHz on XTALI instead of a crystal.

Would you tell me the requirements of external oscillator? Frequency stability (ppm), output load, jitter and etc.

EdwinHz · ‎10-03-2023

As long as the external 24MHz oscillator complies with the description seen in "Table 4. Clocks configurations" of the Hardware Development Guide for the MIMXRT1160/1170 Processor, you will be OK. As you can see, the restrictions mostly depend on whether or not you are using USB and/or Ethernet.

Let me know if this helps.

BR,
Edwin.

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EdwinHz · ‎10-03-2023

Hi @Eugene3,

As long as the external 24MHz oscillator complies with the description seen in "Table 4. Clocks configurations" of the Hardware Development Guide for the MIMXRT1160/1170 Processor, you will be OK. As you can see, the restrictions mostly depend on whether or not you are using USB and/or Ethernet.

Let me know if this helps.

BR,
Edwin.

Eugene3 · ‎10-03-2023

Hi @EdwinHz

Thank you, I got it.