The processor includes below voltage monitors:
- VMON_1V8_SOC and
VMON_3V3_SOC: These pins are recommended to be connected directly to their
respective 1.8 V and 3.3 V supplies. An internal resistor divider is
implemented inside the processor for each of these pins.
- VMON_VSYS: Connects the
system voltage (3.3 V or 5 V) through a voltage divider (0.45 V ±3%).
Consider implementing a capacitor for noise filtering as described in the
device-specific data sheet.
For more information see the System
Power Supply Monitor Design Guidelines section in the Applications,
Implementation, and Layout chapter of the device-specific data sheet.