Motorola LS3578 - Manual (Page 127)

RS-232 Interface 7 - 9
Parity
A parity check bit is the most significant bit of each ASCII coded character. Select the parity type according to host
device requirements.
Select Odd parity to set the parity bit value to 0 or 1, based on data, to ensure that an odd number of 1 bits are
contained in the coded character.
Odd
Select Even parity to set the parity bit value to 0 or 1, based on data, to ensure that an even number of 1 bits are
contained in the coded character.
Even
Select Mark parity and the parity bit is always 1.
Mark