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Using ONLY 32MHz crystal?

Hello, is it possible to use JUST 32MHz crystal, i.e. WITHOUT using the 16Mhz crystal?

Thank you

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  • Hi,

    Yes, you can use a 32MHz crystal. This must then be set in the NRF_CLOCK->XTAL_FREQ register (see reference manual, chapter 7). The MCU starts up on RC oscillator (16M), then automatically switches when the external crystal is started and running. Note that the core will still run on 16M, as it will be divided internally in the chip.

    The advantage of using 32M xtal is the physical size, as they are smaller than 16M crystals.

    Best regards Håkon

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  • Hi,

    Yes, you can use a 32MHz crystal. This must then be set in the NRF_CLOCK->XTAL_FREQ register (see reference manual, chapter 7). The MCU starts up on RC oscillator (16M), then automatically switches when the external crystal is started and running. Note that the core will still run on 16M, as it will be divided internally in the chip.

    The advantage of using 32M xtal is the physical size, as they are smaller than 16M crystals.

    Best regards Håkon

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