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proteusmk
Visitor II
May 8, 2025
Question

USB-C and PCIe on the STM32MP257F-EV1 at the same time?

  • May 8, 2025
  • 1 reply
  • 390 views

Is it possible to operate USB-C (CN15) and Mini-PCIE (CN13) on the STM32MP257F-EV1 board with end devices at the same time? For example: A USB-C 4 port hub is connected to the USB-C port and a WLAN card is connected to the PCIE port.

The documentation says that this is not possible at the SAME time. I understand that because it is a combophy.

In the figure MSv67526V2 on the page https://wiki.stmicroelectronics.cn/stm32mpu/wiki/COMBOPHY_internal_peripheral there is the Mode_sel pin which is probably for activating the two modes. So it should be possible to activate the corresponding mod with the software.
If so, this is also supported in the Linux kernel.
Thanks for an answer.

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    PatrickF
    Technical Moderator
    May 9, 2025

    Hi @proteusmk 

    Maybe a confusion between USB Type-C and USB Super-Speed capabilities (which are not linked).

    USB Type-C (CN15) and Mini-PCIE (CN13) of the STM32MP257F-EV1 board could work at same time.

    On this board, HW for USB Type-C on CN15 is only supporting High-Speed (480 Mbits/s).

    as well as the SuperSpeed PHY (COMBOPHY) is tied by HW to build the mini-PCIE port.

     

    If you want USB Type-C SuperSpeed (5Gbits/s), you should use STM32MP257F-DK, which does not have PCIE.

     

    Regards

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