SH7708 Datasheet, PDF (354/625 Pages) Renesas Technology Corp – SuperH™ RISC engine

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
0
1
Description
8-bit data
value)
(Initial
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
0
1
Description
Parity bit not added or checked
value)
(Initial
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/E)
setting. Receive data parity is checked according to the even/odd (O/E)
mode setting.
Bit 4—Parity Mode (O/E): Selects even or odd parity when parity bits are added and checked. The
O/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/E
0
1
Description
Even parity
value)
(Initial
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.
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