18.1 Overview

The Supply Controller (SUPC) manages the voltage reference and power supply of the device.

The SUPC controls the voltage regulators for the core (VDDCORE) domain. It sets the voltage regulators according to the sleep modes, or the user configuration.

The SUPC embeds two Brown-out Detectors: BODVDD monitors the voltage applied to the device (VDD) and BODCORE monitors the internal voltage to the core (VDDCORE). The BOD can monitor the supply voltage continuously (continuous mode) or periodically (sampling mode).

The SUPC embeds a Power-on Reset (POR) on VDD and VDDIO:

  • Monitoring is always activated, including during device start-up or during any sleep modes
  • If VDD goes below the threshold voltage, the entire chip is reset
  • If VDDIO goes below the threshold voltage, all I/Os supplied by VDDIO are reset
Note: POR minimum and maximum threshold voltages can be found in Power Supply Electrical Specifications in the Electrical Characteristics chapter.

The SUPC also generates a selectable reference voltage which can be used by analog modules such as the ADC or DAC.