Set the data bits, stop bit, and parity.
8
-N-1 = 8 data bits, no parity, stop bit 1
8-N-2 = 8 data bits, no parity, stop bit 2
7-E-1 = 7 data bits, even parity, stop bit 1
7-E-2 = 7 data bits, even parity, stop bit 2
7-N-1 = 7 data bits, no parity, stop bit 1
7-N-2 = 7 data bits, no parity, stop bit 2
7-O-1 = 7 data bits, odd parity, stop bit 1
7-O-2 = 7 data bits, odd parity, stop bit 2