Question about using nrf52 with 32k XTAL

RE: Question about using nrf52 with 32k XTAL

davidzweig — Fri, 06 Dec 2019 11:15:33 GMT

Thank you for excellent support. :-)

RE: Question about using nrf52 with 32k XTAL

Simonr — Fri, 06 Dec 2019 09:54:43 GMT

Hi David

The calibration procedure of the RC oscillator is not blocking, TASKS_CAL is called to start the process and when it's done you'll receive the EVENTS_DONE event, so this should not interfere with your application's timing requirements.

As per the PWM specification, change of polarity, duty-cycle, and base frequency is possible on every PWM period, so there should not be a large delay when setting the PWM duty cycle.

Best regards,

Simon

RE: Question about using nrf52 with 32k XTAL

davidzweig — Thu, 05 Dec 2019 18:09:51 GMT

Ah, also, I have seen on one at least one microcontroller, that when changing the registers to set PWM duty cycle, it can take 1ms or so for the pin output to reflect the new duty cycle. This can be an issue when driving an LED matrix. Does this issue need to be considered on the nrf52?