Recommended SPI Pin for nRF52820

[kenny12345]

Hi, from nRF52820 datasheet, some GPIOs pins are stated it use for low frequency I/O only with up to 10KHz.

May I know is that mean these Pins are not suitable for SPI? As SPI frequency normally in MHz.

And what is the switching frequency of other GPIOs Pins?

[Jared]

Hi

Hi, from nRF52820 datasheet, some GPIOs pins are stated it use for low frequency I/O only with up to 10KHz.

May I know is that mean these Pins are not suitable for SPI? As SPI frequency normally in MHz.

Yes, this is correct. They shouldn't be used for serial communication since it can interfere with the radio. You should use other pins that aren't marked as low frequency/low drive.

And what is the switching frequency of other GPIOs Pins?

There isn't similar limitation on other GPIO pins that doesn't have this marking. 

regards

Jared