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On-Line Manuals MCBXC800 User's Guide | Serial PortThe MCBXC866 board supports the on-chip serial UART which uses a level-shifter (IC2) to convert the logic signals to RS-232 voltage levels. The ASC0 UART may be used in bootstrap mode to download Flash programming tools or other debugging utilities.
The serial UART port (COM) is configured as a standard 3-wire interface. The DB9 connector is wired to loop the PC's handshaking signals back to the PC. Refer to the figure below for details.
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