Boot 0 question

[Xavoy]

Hi again,

i see that BOOT 0 pin is used for selecting which memory the MCU reads from. Connecting that pin to GND forces the MCU to read from the main flash memory while setting it to 3v3 allows the MCU to read from the system memory. Could you please tell me why you did not use the option for system memory (BOOT0=3v3)? In this mode you have a default bootloader for the MCU.