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The receive-data buffer is user accessible and contains the last received character from the receive shift register. Reading UxRXBUF resets the receive-error bits, the RXWAKE bit, and URXIFGx. In 7-bit data mode, UxRXBUF is LSB justified and the MSB is always reset.
UxTXBUF, USART Transmit Buffer Register:
The transmit data buffer is user accessible and holds the data waiting to be moved into the transmit shift register and transmitted on UTXDx. Writing to the transmit data buffer clears UTXIFGx. The MSB of UxTXBUF is not used for 7-bit data and is reset.
