How to Design a Minimal System for a Microcontroller
The STM32 microcontroller has the following types of power supply: Main Power Supply (VDD / VSS) The main power supply refers to the pins labeled as VDD1, VDD2, etc. Each pin must be connected to a 100nF filtering capacitor, placed as close to the pin as possible. In addition, a shared 10uF tantalum capacitor is required. Backup Power Supply (VBAT)