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Thread: Running Teensy 4.0 (or 4.1 or 4 mm) at 48MHz

  1. #1
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    Running Teensy 4.0 (or 4.1 or 4 mm) at 48MHz

    For testing some timings I would be able to run a Teensy 4.1 at 48MHz, to keep it aligned with 3.2 and LC code.

    I've added the 48MHz inside the boards file for arduino and it seems to work.

    Any disadvantages or problems with that?


    BTW. When selecting 150MHz the F_CPU_ACTUAL is a bit higher.

  2. #2
    Senior Member+ defragster's Avatar
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    USB and all seem to run even at 24 MHz - so not sure of any reason 48 MHz would be problematic.

    Setting the clocks is on some even MHz chunk and during the calculation it is rounded up from the requested speed as needed to be no slower than requested.

  3. #3
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    Quote Originally Posted by defragster View Post
    USB and all seem to run even at 24 MHz - so not sure of any reason 48 MHz would be problematic.

    Setting the clocks is on some even MHz chunk and during the calculation it is rounded up from the requested speed as needed to be no slower than requested.
    Thanks.

    I've done some tests and those seem to run ok. I was suspicious because it was absent.

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