Im doing my first schematic with STM32. I want to use STM32F030CCT6. However im not really sure what to do it's BOOT0. I have googled STM32 schematics and they all have BOOT0 and BOOT1. Mine have only BOOT0. Checked all pins. Obviously i could just put a jumper so i can later give it Vcc or GND. But i would like to know why it has only one BOOT but other similar chips have two. Im also using UART to USB chip so i would like to program it over UART as well and read serial data.