Power supply monitoring

Power monitor solutions are available in the device, in order to survey the VDD (battery voltage).

Power supply supervisor

The power supply supervisor enables monitoring of the connected power supply.

Two functionalities are implemented:
  • Power-on reset (POR): Generates a reset when the supply is applied to the device, and ensures that the device starts up in a known state
  • Brownout reset (BOR): Generates a reset when the supply drops below the minimum voltage required for safe operations
Two BOR levels are used:
  • VBOROFF, used in System OFF
  • VBORON, used in System ON

The power supply supervisor is illustrated in the image below.

Figure 1. Power supply supervisor
Power supply supervisor

Battery monitoring on VDD

A battery voltage (VDD) monitoring capability is provided via a modem API

Note: For details regarding the modem API, please refer to nRF Connect SDK document and nRF91 AT Commands, Command Reference Guide document.

Electrical specification