15.1 Description

The Supply Controller (SUPC) is a VDDBU-powered (resulting voltage from VBAT/VDD3V3 selection) peripheral in charge of:

• Sequencing the internal circuits (VDDCORE regulator, oscillators, etc.) at device power-up or wake-up, as well as when entering a low-power mode (Backup mode, Wait mode),
• Slow clock (MD_SLCK and TD_SLCK) generation
• Internal supply regulator control
• Control of external power supply circuit (via SHDN pin)
• Supply Monitoring functions (Power-on Reset, Supply Monitors) management
• Wake-up event detection
• Tamper event detection

The SUPC configuration is saved as long as VDDBU supply is maintained.