SH7708 Datasheet, PDF (365/633 Pages) Renesas Technology Corp – SuperH™ RISC engine

Bit 3—Stop Bit Length (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, but 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): 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)
Bits 1 and 0—Clock Select 1 and 0 (CKS1 and CKS0): These bits select the internal clock source
of the on-chip baud rate generator. Four clock sources are available: Pφ, Pφ/4, Pφ/16 and Pφ/64.
For further information on the clock source, bit rate register settings, and baud rate, see section
13.2.9, Bit Rate Register.
Bit 1: CKS1 Bit 0: CKS0
0
0
1
1
0
1
Note: Pφ: Peripheral clock
Description
Pφ
Pφ/4
Pφ/16
Pφ/64
(Initial value)
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