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Serial Port

The MCBXC167 board supports the ASC0 on-chip serial UART and uses a SP232A (IC9) to convert the logic signals to RS-232 voltage levels. The ASC0 UART may be used in bootstrap mode to download Flash programming tools, Monitor 166, or other debugging utilities.

MCBXC167 Board Serial Port

The serial port (COM1) 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.

Loop Back Diagram

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