Hello!
Prehistory:
USB DFU works flawlessly on another my design which is based on the STM32H743ZGT6.
When it is powered on with BOOT0=1, I measure 3.3V on the USB_DP processor pin with a USB cable disconnected from the board.
Problem:
There is a USB DFU issue on the design based on the STM32F413VGT6.
Facts for a power-on with BOOT0=1 (jumper X10 is not installed):
1) USB_FS_DP voltage is about 0.2V
2) the processor is not discovered as DFU when USB cable is connected to a PC
3) R200 was replaced with 51 Ohm - no change in behaviour
4) test firmware implements blinking LED, so when BOOT0=1, it is definitely is not executed, because the LED is off.
When BOOT0=0 and test firmware configured USB as DFU, after power-on I measure 3.3V on the USB_FS_DP signal.
