Firware update via USART1 while usb host is connected to the usb hi-speed interface

[Tilba.1]

Hi,

In our system design a usb host will be connected to STM32F205 all the time. Can we update our software via USART1 using system bootloader embedded to stm32 while this usb host is connected?

In 9.2.3 Bootloader Section, it is stated that "If a USB cable is plugged into the microcontroller’s USB interface at any time during the bootloader firmware selection sequence, the bootloader enters the DFU bootloader loop waiting for any DFU bootloader command." I think this statetement is about the usb host connected to the usb fs interface. However I couldn't be sure. So here is my question again: Can we update our software via USART1 using system bootloader embedded to stm32 while a usb host is connected to the usb hs interface?

Thanks.

[waclawek.jan]

The STM32F2xx chapter in AN2606 lists all the pins/interfaces which are involved in bootloader. PB14/PB15 are not listed there..

JW