Built-in brownout detector configuration for nrf5340

[ShuMan]

Hi,

We are using nrf5340 nrf connect SDK V2.0.0 and we are unable to find the brownout detector configuration. For our use-case we want to trigger system reset if supply voltage goes below safe level. Currently what we have observed is nrf5340 is operating at 1.8 V but we need to configure the safe level voltage to 2.7 V so that if the voltage goes below 2.7 V the chip will reset.

Thanks

[Håkon Alseth]

Hi,

 

BOR voltage level is hardcoded in hardware:

https://infocenter.nordicsemi.com/topic/ps_nrf5340/regulators.html?cp=3_0_0_3_6_4_3#unique_995785767

 

If you want an event on a given voltage level, you can either manually check the NRF voltage level using the SAADC, or use the POF:

https://infocenter.nordicsemi.com/topic/ps_nrf5340/chapters/supply/doc/power_supply.html?cp=3_0_0_3_4_2_0#topic

 

Kind regards,

Håkon