Is Dfuse by external USB phy possible with STM32F777

Chet Ferry · ‎2017-03-22

Posted on March 22, 2017 at 13:14

Is it possible to use DFUSE to update via USB if I have an external phy? I'm using an STM32F777. I do have a 25 MHz external crystal for HSE.

Uwe Bonnes · ‎2017-03-26

Posted on March 26, 2017 at 14:18

The internal bootloader is only available on OTG_FS. Have a look at AN2606. Even the STM32F723 with internal phy does not have a system memory bootloader for OTG_HS.

Chet Ferry · ‎2017-03-26

Posted on March 26, 2017 at 18:04

Thanks so much for your reply. I will give the apnote a more thorough read. It turns out I don't need the higher speed and external phy on this board. I'm still in the schematic phase of the design and will move to the OTG_FS. You have saved me from making a mistake that would have caused another board spin. Thanks!