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Serial Ports

The MCBSTR7 board connects the two on-chip serial UARTs to the SP3232 (N2), which converts the logic signals to RS-232 voltage levels.

MCBSTR7 Board

The serial ports (COM) are 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 DB9 Diagram

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