I have a need for an interrupt to go off at a 4khz rate. For this, I am using a repeated App Timer (running off the 32k crystal).
Prior to adding this extra timer, we used to have a power consumption of about 60ua. If I enable the timer to run at 4khz (and do nothing at all within the interrupt handler), power consumption goes up significantly - ~1.3ma. Is there any obvious reason why this happens?
I am setting up the app timers in the same way as the other 5 timers used in the project (which work with the low 60ua current consumption). With a couple of mods (to toggle a pin within the interrupt routine), we have checked on an oscilloscope, and the interrupt appears to be serviced very quickly.
I am currently using Softdevice v3.0.0, NRF52832, SDK version 12.2.