If i had to guess that 10 pin pad set on the board it will be debug/jtag/bsp port. It is extremely lucky if it turns out to be a debug port but there is a simple rs232 rx/tx pin pair for ser comm, actually the 115kbps reading supports this as it is a very common ser port speed, relatively easy to verify if thats ser comm or not with a good terminal emulator on the pc side. I will really laugh if it dumps a bootlog there
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