[SOLVED] J-link VCOM port for STM32G431 MCU

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  • [SOLVED] J-link VCOM port for STM32G431 MCU

    I have the J-LINK working for the jtag interface to my STM32G431 project. I am using the 5 pins (SWDIO/TMS, SWCLK/TCK, SWO, JTDI, and JTRST). Is there a way to use this same interface simultaneously with a virtual com port to the MCU? What is the pin connection from these pins to the com port Rx and Tx?.

    Thanks,
    Brian

  • I'll answer my own question.... After some digging it looks like I can't use the VCOM port on a 10-pin connector. It takes the Rx and Tx on separate pins according to the JLINK manual. Unfortunately, my small board can't take the large connector.

  • Hi,

    VCOM cannot be used in parallel to JTAG.
    If you use SWD instead of JTAG, you can use VCOM in parallel.

    Reg. the big connector:
    How about this?
    segger.com/products/debug-prob…rs/10-pin-needle-adapter/
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