HD6417034 Datasheet, PDF (391/691 Pages) Renesas Technology Corp – SuperH RISC ENGINE SH7032 AND SH7034

• Bit 4 (Parity Mode (O/E): 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 checking. The O/E setting is ignored in
synchronous mode, or in asynchronous mode when parity addition and checking is disabled.
Bit 4: O/E
0
1
Description
Even parity
(Initial value)
If 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.
Odd parity
If 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)): STOP selects one or two bits as the stop bit length in
asynchronous mode. This setting is used only in asynchronous mode. It is ignored in
synchronous mode because no stop bits are added.
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 3: STOP
0
1
Description
One stop bit
(Initial value)
In transmitting, a single 1-bit is added at the end of each transmitted
character.
Two stop bits. In transmitting, two 1-bits are added at the end of each
transmitted character.
• Bit 2 (Multiprocessor Mode (MP)): MP selects multiprocessor format. When multiprocessor
format is selected, settings of the parity enable (PE) and parity mode (O/E) bits are ignored.
The MP bit setting is used only in asynchronous mode; it is ignored in synchronous mode. For
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)
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