using LPCOMP to measure vdd

[inya_lake]

Hi, is it possible to measure NRF52832 vdd voltage using LPcomp. I know I can do it with ADC but it draws a lot of current. I'm thinking if I can compare VDD to lpcomp reference voltage, it will let me know once it goes below certain value. I don't get exact battery level like measuring with SAADC but at least it will let me know if it goes below certain voltage value.

Thanks,

[Turbo J]

If you only want a power fail indicator, there is a power fail comperator in the POWER block: POFCON register.

When using SD, use SD functions to set the POF threshold value (POWER is a restricted peripherial).

[inya_lake]

No, I'm looking to detect when vdd cross certain value (low battery) using Lpcomp instead of ADC. More of a low battery indicator without using ADC