SH7014 Datasheet, PDF (345/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

12. Serial Communication Interface (SCI)
Bit 4⎯Parity Mode (O/E): Selects even or odd parity when parity bits are added and checked.
The O/E setting is used only in asynchronous mode and only when the parity enable bit (PE) is set
to 1 to enable parity addition and check. The O/E setting is ignored in the clock synchronous
mode, or in the asynchronous mode when parity addition and check is disabled.
Bit 4
O/E
Description
0
Even parity*¹
(initial value)
1
Odd parity*²
Notes: 1. If even parity is selected, the parity bit is added to transmit data to make an even
number of 1s in the transmitted character and parity bit combined. Receive data is
checked to see if it has an even number of 1s in the received character and parity bit
combined.
2. If odd parity is selected, the parity bit is added to transmit data to make an odd number
of 1s in the transmitted character and parity bit combined. Receive data is checked to
see if it has an odd number of 1s in the received character and parity bit combined.
Bit 3⎯Stop Bit Length (STOP): Selects one or two bits as the stop bit length in the
asynchronous mode. This setting is used only in the asynchronous mode. It is ignored in the clock
synchronous mode because no stop bits are added.
Bit 3
STOP
Description
0
One stop bit*¹
(initial value)
1
Two stop bits*²
Notes: 1. In transmitting, a single bit of 1 is added at the end of each transmitted character.
2. In transmitting, two bits of 1 are added at 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, but if the second stop bit is 0, it is treated as the start bit of
the next incoming character.
Rev.5.00 Sep. 27, 2007 Page 311 of 716
REJ09B0398-0500