CE_RXOVER

An input buffer overflow has occurred. There is either no room in the input buffer, or a character was received after the end-of-file (EOF) character.

CE_OVERRUN

A character-buffer overrun has occurred. The next character is lost.

CE_RXPARITY

The hardware detected a parity error.

CE_FRAME

The hardware detected a framing error.

CE_BREAK

The hardware detected a break condition.

CE_TXFULL

The application tried to transmit a character, but the output buffer was full.