1 such as the title, drew a STM32F405 minimum hardware and software systems ,, no problem, but Marquee is not bright, toss some time, thought it was a voltage problem, decided to re-drawing board, only to find that the resistance problem BOOT0 and BOOT1 circuit , pull-up resistor should be selected and BOOT0 BOOT1 circuits, namely: R9 R10 welding, not welded R14 R15 (previously has been blocked because of their welding to R14 R15, and drop-down, in fact, should pull-up)
2. attach BOOT0 and BOOT1 setting mode and meaning.
