UART port
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=113449
Printed Date: 11 Feb 2026 at 2:48am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: UART port
Posted By: M440
Subject: UART port
Date Posted: 10 Feb 2026 at 11:53pm
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hello, there is an UART port on my Asrock AM5 motherboard. Is there any documentation for it? ------------- asrock b650m-hdv/m.2, ryzen 7700x@85watt, arch/kde |
Replies:
Posted By: Xaltar
Date Posted: 11 Feb 2026 at 12:46am
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Hi M440, a bit of digging led me to this thread on redit: https://www.reddit.com/r/buildapc/comments/pr1mpf/what_is_uart1_and_what_do_i_plug_in_there_i_have/" rel="nofollow - https://www.reddit.com/r/buildapc/comments/pr1mpf/what_is_uart1_and_what_do_i_plug_in_there_i_have/ It looks to be something used in house at ASRock for debugging/programming ROMs etc. From what I gather reading through that thread it may also be what provides the data for boards that have Dr. Debug displays. Given that the few mentions I managed to find in ASRock manuals said "for factory use only" I don't imagine ASRock would be willing to provide any documentation on the header/port. Regardless, I suspect it is useless as a UART port for any purpose other than debugging with ASRock's own in house testing tools. Great question and a neat find, after reading your question I found UART ports on several of my own ASRock boards too. Might be fun to rig up a reader that can output the codes for debugging. Not something I really need as all my boards still work perfectly, even my old socket 775 and socket 462 boards. Hope this helps. You could always try a support ticket, someone at ASRock may be willing to give a bit more detail, I doubt it but no harm trying. ------------- 
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