SH7708 datasheet(364/633 Pages) RENESAS

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Bit 6—Character Length (CHR): Selects 7-bit or 8-bit data in asynchronous mode. In synchronous

mode, the data length is always 8 bits, regardless of the CHR setting.

Bit 6: CHR

Description

8-bit data

(Initial value)

7-bit data. (When 7-bit data is selected, the MSB (bit 7) of the transmit

data register is not transmitted.)

Bit 5—Parity Enable (PE): Selects whether to add a parity bit to transmit data and to check the

parity of receive data, in asynchronous mode. In synchronous mode, a parity bit is neither added

nor checked, regardless of the PE setting.

Bit 5: PE

Description

Parity bit not added or checked

(Initial value)

Parity bit added and checked. When PE is set to 1, an even or odd

parity bit is added to transmit data, depending on the parity mode (O/

setting. Receive data parity is checked according to the even/odd (O/

mode setting.

Bit 4—Parity Mode (O/

E): Selects even or odd parity when parity bits are added and checked. The

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, and in

asynchronous mode when parity addition and checking is disabled.

Bit 4: O/

Description

Even parity

(Initial value)

If even parity is selected, the parity bit is added to transmit data to make

an even number of 1s in the transmitted character and parity bit

combined. Receive data is checked to see if it has an even number of

1s in the received character and parity bit combined.

Odd parity

If odd parity is selected, the parity bit is added to transmit data to make

an odd number of 1s in the transmitted character and parity bit

combined. Receive data is checked to see if it has an odd number of 1s

in the received character and parity bit combined.

SH7708 데이터시트(PDF) 364 Page - Renesas Technology Corp