H8SLASH3028F datasheet(488/923 Pages) RENESAS

488 / 923 page

Rev. 2.00, 09/03, page 458 of 890

Bit 4—Parity Mode (O/

EEEE): Selects even or odd parity. The O/E bit setting is only valid when the

PE bit is set to 1, enabling parity bit addition and checking, in asynchronous mode. The O/

E bit

setting is ignored in synchronous mode, or when parity addition and checking is disabled in

asynchronous mode.

Bit 4

Description

Even parity*

(Initial value)

Odd parity*

Notes: 1. When 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.

2. When 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): Selects one or two stop bits in asynchronous mode. This setting

is used only in asynchronous mode. In synchronous mod no stop bit is added, so the STOP bit

setting is ignored.

Bit 3

STOP

Description

01 stop bit*

(Initial value)

2 stop bits*

Notes: 1. One stop bit (with value 1) is added to the end of each transmitted character.

2. Two stop bits (with value 1) are added to 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. If the second stop bit is 0, it is treated as the start bit of the

next incoming character.

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

format is selected, parity settings made by the PE and O/

E bits are ignored. The MP bit setting is

valid only in asynchronous mode. It is ignored in synchronous mode.

For further information on the multiprocessor communication function, see section 13.3.3,

Multiprocessor Communication.

Bit 2

Description

Multiprocessor function disabled

(Initial value)

Multiprocessor format selected

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