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Serial Ports

The MCB950 board connects the on-chip serial UART to the MAX3221 (IC1), which converts the logic signals to RS-232 voltage levels. The ASCO UART may be used in bootstrap mode to download other utilities for debugging or downloading flash.

The MCB950 board connects directly to a PC using a standard USB cable that provides power and emulates a COM interface for UART0.

Serial Port

The serial UART port (COM1) is configured as a standard 3-wire interface. Refer to the figure below for details.

Serial Ports Loop Back diagram

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