ST-LINK on STM32L552E-EVAL board

[DYann.1]

Hello,

I have a evaluation board STM32L552E-EVAL, and I would like to know what is this part used for ?

I see 2 pins (USB_D_N and USB_D_P) that connect to the STM32F103CBT6

What is it for ? To program the component and debug. Thank you for your answer

Regards

Yann DO

[Uwe Bonnes]

It is ESD protection

[Andrew Neil]

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@DYann.1 wrote:

what is this part used for ?

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What part - the USBLC6-2 ?

Its datasheet tells you what it's for:

https://www.st.com/resource/en/datasheet/usblc6-2.pdf

via: https://www.google.com/search?q=usblc6-2sc6

[Tesla DeLorean]

>>To program the component and debug. 

I'd have thought this would have been readily obvious, the on-board debugger. ST-LINK/V2-1

Provides the USB CDC connectivity to a L552 UART, and an USB MSC to drag-n-drop firmware binaries, as originally used by mbed

[Andrew Neil · Accepted solution]

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@DYann.1 wrote:

the STM32F103CBT6

What is it for ?

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That is the ST-Link - for programming and debugging

https://www.st.com/resource/en/user_manual/um2597-evaluation-board-with-stm32l552ze-mcu-stmicroelectronics.pdf#page=8

via: https://www.st.com/en/evaluation-tools/stm32l552e-ev.html#documentation

[DYann.1]

Thank you

[DYann.1]

Hi,

Thank you, in fact I would like to program and debug via J-LINK SEGGER. In fact, on my real card I do not use the ST-LINK (for consumption). Do you know where I can find the information to configure the J-LINK to be able to work under STMCubeIDE ? I can see some information but it's not very clear for my. 

Thank you

[Tesla DeLorean]

I'd imagine under debugger settings, perhaps videos on YouTube if reading not strong

See this if you want it to present as a "J-Link OB"

https://www.segger.com/products/debug-probes/j-link/models/other-j-links/st-link-on-board/

[DYann.1]

I will look at this link. I can work with the J-LINK with my STM32L552xx evaluation card but I still need the ST-LINK usb connector otherwise it doesn't work under STM32CubeIDE. I just need to select J-LINK :

So according to your previous answer, I guess ST-LINK usb is for programming and J-LINK is for DEBUG, right ? If I remove the ST-LINK usb then it does not work.

Thanks

[Andrew Neil]

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@DYann.1 wrote:

I guess ST-LINK usb is for programming and J-LINK is for DEBUG, right ?

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No, not at all.

Both J-Link and ST-Link are full programmers and debuggers.

But this is a different question from your original (solved) one - please start a new thread for a new question.