I have a Nucleo-F746ZG and an F429ZI board, both of the board can be recognized by PC as a USB device via ST-LINK USB port.

However, due to project space limitation, I have to detach the ST-LINK and use the other USB connector(CN13 USER USB).

When I use the CN13 USB connector, I gave the board external power supply 12V to VIN as manual described, but there is no response on PC, not even the 'Unknown device', am I missing something there? Thanks.

New contributor
Dakai Ou is a new contributor to this site. Take care in asking for clarification, commenting, and answering. Check out our Code of Conduct.
  • \$\begingroup\$ Do you have any firmware loaded onto the processor with USB device support? The on-board USB port requires firmware (possibly a boot loader) to operate as a USB device. \$\endgroup\$ – Dean Franks Mar 26 at 5:33

Your Answer

Dakai Ou is a new contributor. Be nice, and check out our Code of Conduct.

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.