Hi... We are planning to use STM32H503 in our application. Due to size constraints in the PCB dimensions, we are going with internal clock for both MCU & internal RTC.Since, internal clock is used, the frequency given to the internal RTC ranges from ...

Hi... We are planning to use STM32H503KB (32 pin package) in our application. The MCU VDD is supplied from either of the two sources:1. With power supply (5V)2. With 3V cellOur need is to bring the MCU to standby mode when the supply is provided from...