SPI custom bit rate (frequency)

[Nebojsa_J]

Hello....

Is there a way to configure the SPI peripheral(s) to run at a custom bit rate (frequency)?... For example: Run SPI at 3.4MHz.. or any other custom frequency that's different from the default ones that are defined in the Nordic SPI configuration docs.

Why would I need this?: I would like to use the SPI peripheral for a custom communication link where bit width is important. This goal can be achieved using bit banging, but SPI would work well if there is a way to make it run at an arbitrary frequency.

Thanks,

Nebojsa

  

[MartinBL]

Hi,

Changing to an arbitrary frequency isn't straightforward and you will have to rely on trial and error. Please see my answer here: RE: NRF52832 TWI at 50 KHz (SMBus Compatibility). The issues regarding the frequency is the same for both TWI, SPI, and UART.