low power comparator in nrf51.

[nordicbeginner]

hello there i want to use low power comparator nrf51. now my device work with battery. so i think i require internal reference. now can you tell me how to use internal reference??

[ovrebekk]

Hi

There is no internal reference option for the LPCOMP. You either have to use VDD * N/8 as reference (where N = {1,2,3,4,5,6,7}), or an external reference supplied through the AREF0 or AREF1 pin.

Are you trying to detect a low battery? If so you might want to use the Power On Fail feature instead.

Best regards
Torbjørn

[nordicbeginner]

yes i am trying to detect a low battery. can you tell me how to use power on the failure