SH7708 datasheet(365/633 Pages) RENESAS

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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

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

Description

Multiprocessor function disabled

(Initial value)

Multiprocessor format selected

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: P

φ, 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

Description

00P

(Initial value)

φ/4

10P

φ/16

φ/64

Note:

φ: Peripheral clock

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