Boot0 resistor. But what if I connect the pin to GND via LED and its 300R resistor? Will it work as sort of pull-down during reset (to boot from main flash)? Mar 19, 2023 · On reference designs, BOOT0 is being pulled down with a 10k resistor. Hope that helps? Regards /Peter However, if you’re using Boot0 + Boot1 pins to select a custom boot mode, you need to connect the Boot1 to a jumper for state selection (0 or 1), and don’t forget to add a pull-up/down resistor of 10kΩ as recommended by the hardware design guidelines of STM32 microcontrollers. 3 directly to the pin makes it work! There is a 100k resistor on the way, and it measures OK with the DMM . BOOT0 only allows you to select the memory area to start the program execution. I prefer to use a jumper rather than a resistor. May 12, 2025 · A pull-down resistor is usually used because you then do not need an (expensive) switch and only have to set BOOT0 to H. The proper way to deal with it can be seen on my Green Pill design: The button SW2 is of course optional but while the pull-up resistor on the reset line (as indicated) is optional, the pull-down resistor R5 on Boot0 is not optional. but I'm stuck with (BOOT0) pin. The strength of the pull-down is not very critical. If I know I only want to boot from the main flash memory, can I connect BOOT0 directly to GND? Why boot0 was pulldown with a 100k resistor but connected boot1 without GND resistor. lhnc ibnypv zbjlb jmrowq xnyi ignypi uxgldg jotev korro zhai