Rev. 1.0, 02/00, page 404 of 1141
Bit 5
Parity Enable (PE): In asynchronous mode, selects whether or not parity bit addition is
performed in transmission, and parity bit checking in reception. In synchronous mode, or when a
multiprocessor format is used, parity bit addition and checking is not performed, regardless of the
PE bit setting.
Bit 5
PE
Description
0
Parity bit addition and checking disabled
(Initial value)
1
Parity bit addition and checking enabled*
Note:
*
When the PE bit is set to 1, the parity (even or odd) specified by the O/
(
bit is added to
transmit data before transmission. In reception, the parity bit is checked for the parity
(even or odd) specified by the O/
(
bit.
Bit 4
Parity Mode (O/
((((
): Selects either even or odd parity for use in parity addition and
checking.
The O/
(
bit setting is only valid when the PE bit is set to 1, enabling parity bit addition and
checking, in asynchronous mode. The O/
(
bit setting is invalid in synchronous mode, when parity
bit addition and checking is disabled in asynchronous mode, and when a multiprocessor format is
used.
Bit 4
O/
(
((
(
Description
0
Even parity
*1
(Initial value)
1
Odd parity
*2
Notes: 1. When even parity is set, parity bit addition is performed in transmission so that the total
number of 1 bits in the transmit character plus the parity bit is even. In reception, a
check is performed to see if the total number of 1 bits in the receive character plus the
parity bit is even.
2. When odd parity is set, parity bit addition is performed in transmission so that the total
number of 1 bits in the transmit character plus the parity bit is odd. In reception, a
check is performed to see if the total number of 1 bits in the receive character plus the
parity bit is odd.