Nucleo-H563ZI can't start when powering through usbuser

[kehan]

When I use usbuser to power the Nucleo-H563ZI board, I have add jumper in the usbuser at JP2.Then ld5 and ld7 light up, but the mcu firmware doesn't start properly. I need to add jumper in the CHGR at JP2 then the mcu firmware can start. According to the manual, isn't it only necessary to jumper the usbuser, why is this happening?

 

[alfsch]

Maybe it's just the power for onboard st- link that's needed, because the clock for h563 is coming from there. So If it is not powered, no HSE clock for h563 and then it's not working .

[jiangfan]

The case you mentioned should be rare.

possible reason: on board STLINK is not in expected state, so STLINK holds STM32H563ZI in reset state, then "the mcu firmware doesn't start properly". You may check if STM32H563ZI /RESET pin is at LOW state.

 

"to add jumper in the CHGR at JP2", so, STLINK is powered up and STM32H563ZI will not be held in reset state, and "then the mcu firmware can start".