Husky MP2500 Manual page 155

PARITY
Use
To select the data parity to add to transmitted data, and the data parity
checking that will be used to check received data.
Fixed parities (Mark and Space) can be selected by directly programming
the UART.
Notes
When transmitting, PARITY has the following significance:
Setting Result
None A parity bit is not added.
Odd A parity bit of 0 or 1 is added to produce an odd number
of logical 1's in the data bits.
Even
of logical 1's in the data bits.
When receiving, PTY has the following significance:
Setting Result
None A parity bit is not expected. If parity bits are sent, they will
produce data framing errors.
Odd The data is checked for an odd number of logical 1's
(including the parity bit). If the check succeeds, the
character is returned to the calling program. If the check
fails, the character is not returned and a parity error is
flagged.
Even
(including the parity bit). If the check succeeds, the
character is returned to the calling program. If the check
fails then the character is not returned and a parity error is
flagged.
Chapter 13: Introduction to Communications
A parity bit of 0 or 1 is added to produce an even number
The data is checked for an even number of logical 1's
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