Hello,
We're interested in measuring the precision of our external crystal, but don't have the equipment to measure off the crystal directly without affecting capacitive loading.
Some microcontrollers have the ability to drive the clock out a GPIO pin, but I haven't seen anything mentioned for the nRF51822.
I've been able to use the RTC tick event to trigger a GPIOTE task to toggle a pin, but this ends up dividing our clock by 2 and possibly introducing further jitter.
I'd like to know if there's a direct way to bring out LFCLK on a GPIO, and if there isn't, whether using the RTC tick event though PPI and GPIOTE will introduce jitter (and how much).
Thanks everybody!