Performance difference between SCC(Internal UART) and 16C554A (External UART)

Hi all,

If I connect a serial device to our MCP855T Processor based customized board
, these is performance difference between Internal UART (SCC) and external
UART (16C554A) , the External UART performance is better than the internal
UART .

what could be the problem , How can I make the Internal UART work with
better performance.

Thanks in advance

Regards,
KP


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