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Technical Support On-Line Manuals MCB2929 User's Guide | Serial PortThe MCB2929 board connects the on-chip serial UART to the ST3232 (IC11), which converts the logic signals to RS-232 voltage levels.
The serial port (COM0) is configured as a standard 3-wire interface. The DB9 connector is wired directly to the ST3232 serial UART. Refer to the figure below for details.
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