3069RF-ZTAT Datasheet, PDF (484/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Bit 4—Parity Mode (O/E): Selects even or odd parity. The O/E bit setting is only valid when the
PE bit is set to 1, enabling parity bit addition and checking, in asynchronous mode. The O/E bit
setting is ignored in synchronous mode, or when parity addition and checking is disabled in
asynchronous mode.
Bit 4
O/E
Description
0
Even parity*¹
(Initial value)
1
Odd parity*²
Notes: 1. When even parity is selected, the parity bit added to transmit data makes an even
number of 1s in the transmitted character and parity bit combined. Receive data must
have an even number of 1s in the received character and parity bit combined.
2. When odd parity is selected, the parity bit added to transmit data makes an odd
number of 1s in the transmitted character and parity bit combined. Receive data must
have an odd number of 1s in the received character and parity bit combined.
Bit 3—Stop Bit Length (STOP): Selects one or two stop bits in asynchronous mode. This
setting is used only in asynchronous mode. In synchronous mode no stop bit is added, so the
STOP bit setting is ignored.
Bit 3
STOP
Description
0
1 stop bit*¹
(Initial value)
1
2 stop bits*²
Notes: 1. One stop bit (with value 1) is added to the end of each transmitted character.
2. Two stop bits (with value 1) are added to the end of each transmitted character.
In receiving, only the first stop bit is checked, regardless of the STOP bit setting. If the second
stop bit is 1, it is treated as a stop bit. If the second stop bit is 0, it is treated as the start bit of the
next incoming character.
Bit 2—Multiprocessor Mode (MP): Selects a multiprocessor format. When a multiprocessor
format is selected, parity settings made by the PE and O/E bits are ignored. The MP bit setting is
valid only in asynchronous mode. It is ignored in synchronous mode.
For further information on the multiprocessor communication function, see section 13.3.3,
Multiprocessor Communication.
Bit 2
MP
0
1
Description
Multiprocessor function disabled
Multiprocessor format selected
(Initial value)
Rev. 5.0, 09/04, page 462 of 978