I am working on a project using the STM32L442 32 pin version.
I am using all pins, pins for external oscillator as GPIO input and pins for STLINK programming as GPIO output.
I am planning to program the MCU by setting BOOT0 pin to 3.3V in programming phase and using UART.
Will i have any problem not using external oscillator and programming the board with the internal bootloader? I could use the larger version of the MCU but I would like to keep it smallest possible.