Outputting a PWM signal at 8Mhz with 50% dutcy cycle

RE: Outputting a PWM signal at 8Mhz with 50% dutcy cycle

Hung Bui — Fri, 24 Mar 2017 15:25:57 GMT

Sorry I didn't notice you want to get 8MHz. I'm afraid it's not possible with PWM driver.

What about using TIMER+PPI ? , here is an example : github.com/.../nrf51-8-mhz-gpio-clock

sananth — Fri, 24 Mar 2017 13:49:58 GMT

Thanks for the response.

One question: By setting top to 4 for a 16MHz clock, make a max value of a 4Mhz output? I need to produce an 8Mhz output.

Hung Bui — Fri, 24 Mar 2017 11:31:13 GMT

Set the top value to 2 is not a good idea. Minimum COUNTERTOP as in the spec is from 3.

Please use 16MHz and choose top_value = 4.