H8S2245 datasheet(454/818 Pages) RENESAS

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Section 12 Serial Communication Interface (SCI)

Rev.3.00 Mar. 26, 2007 Page 412 of 772

REJ09B0355-0300

Bit 3—Stop Bit Length (STOP): Selects 1 or 2 bits as the stop bit length in asynchronous mode.

The STOP bits setting is only valid in asynchronous mode. If clocked synchronous mode is set the

STOP bit setting is invalid since stop bits are not added.

Bit 3

STOP

Description

1 stop bit: In transmission, a single 1 bit (stop bit) is added to the end of a transmit

character before it is sent.

(Initial value)

2 stop bits: In transmission, two 1 bits (stop bits) are added to the end of a transmit

character before it is sent.

In reception, 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 it is 0, it is treated as the start bit of the next transmit

character.

Bit 2—Multiprocessor Mode (MP): Selects multiprocessor format. When multiprocessor format

is selected, the PE bit and O/

E bit parity settings are invalid. The MP bit setting is only valid in

asynchronous mode; it is invalid in clocked synchronous mode.

For details of the multiprocessor communication function, see section 12.3.3, Multiprocessor

Communication Function.

Bit 2

Description

Multiprocessor function disabled

(Initial value)

Multiprocessor format selected

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