Receive Flags

The Receive Flags field gives the host some additional controls over the serial input. It is only effective in the Send_with_Response service.

Bit (0 = LSB)	Status Flag
0	Flush - Flushes the serial input queue before receiving new incoming data.
1-2	Reserved
3	Framing - Serial protocol framing is enabled (see Frame Trailer (Postamble) Flags). This bit can be checked in the response to see if the correct frame format was received.
4-7	Reserved

Flushing the input queue allows the host to remove irrelevant data that was collected by the communication adapter.