When the boot mode activated in STM32F427VIT6 ( BOOT0 pin to HIGH level) , the pin PE13 in strong HIGH state (really 3.3V). Why? The PE13 pin goes to LOW level just if i begin download firmware by UART bootloader
To PE13 just coonected 10k resistor to GND and thats it. Yes, PE13 still in HIGH after reset, look the attached picture from scope . Thanks for you reply:)