Voltage Level Monitor

The Voltage Level Monitor (VLM) acts as an early warning and generates an interrupt request if the supply voltage is about to drop below a given threshold level. This can allow the system to do a safe shutdown.

Being a part of the BOD peripheral, the VLM threshold level can be configured to either 5%, 15% or 25% above the BOD level. The VLM follows BOD functionality. If the BOD is in Sampled mode, the VLM will also be sampled. If the BOD is disabled, the VLM is disabled.

The VLM interrupt can be triggered when the supply voltage crosses from above, from below, or either direction of the threshold level.