Max PWM frequency with 50% duty cycle on nrf52840

[Jonathan E]

Hi,

What is the maximum PWM frequency one can achieve on the nrf52840 with 50% duty cycle? Sample .dts and c-code in NRF Connect SDK would be appreciated!

In practice I just want to achieve the highest possible frequency on a GPIO as possible. Is there another way to achieve a higher frequency than the PWM frequency? For example routing the internal clock to a GPIO?

I appreciate your help.

[Torsten Robitzki]

(mis-)using the QSPI CLK line would give you a frequency of 96MHz. Maybe, you can find a way to have a SPI transaction running all the time.

[Jonathan E]

Good suggestion. Do you have any idea how this can be achieved?

[Torsten Robitzki]

No, but I would try to have an SPI transfer running all the time.