19.2 Features
The following are key features of the SUPC:
- Voltage Regulator System
- Main voltage regulator: LDO or Buck Converter in Active, Standby, or Hibernate mode (MAINVREG)
- Low-Power voltage regulator in Backup mode (LPVREG)
- Controlled VDDCORE voltage slope when changing VDDCORE
- Battery Backup Power Switch
- Automatic switching from main
power to battery backup power
- Automatic entry to Backup mode when switched to battery backup power
- Automatic switching from battery
backup power to main power
- Automatic exit from Backup mode when switched back to main power
- Stay in Backup mode when switched back to main power
- Automatic switching from main
power to battery backup power
- Voltage Reference System
- Reference voltage for ADC and DAC
- 3.3V Brown-out Detector (BOD33)
- Programmable threshold
- Threshold value loaded from NVM User Row at startup
- Triggers resets, interrupts, or Battery Backup Power Switch. Action loaded from NVM User Row
- Operating modes:
- Continuous mode
- Low-Power and Sampled modes for low-power applications with programmable sample frequency
- Hysteresis value from Flash User Calibration
- Monitor VDD or VBAT (PB03)
- 1.2V Brown-out Detector (BOD12)
- Output pins
- Pin toggling on RTC event