Hi vap, In 1Mbps speed overruns happens every 16-32 bytes (one or two FIFO fills), and even in 38400bps - several times in a minute. Is RTS/CTS hardware flow-control supported and enabled on SCIF ports which you are using on your board? If no, you should think about to support and enable it first. If yes, you should change the RTS output active trigger. If RTS/CTS hardware flow-control is enabled and overrun occurs several times, there is a problem on sender side. regards,
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