Hitachi H8/3048 Hardware Manual page 455

Bit 7—Communication Mode
synchronous mode.
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Bit 7
C/A Description
0 Asynchronous mode
1 Synchronous mode
Bit 6—Character Length (CHR): Selects 7-bit or 8-bit data length in asynchronous mode. In
synchronous mode the data length is 8 bits regardless of the CHR setting.
Bit 6
CHR Description
0 8-bit data
1 7-bit data*
Note: * When 7-bit data is selected, the MSB (bit 7) in TDR is not transmitted.
Bit 5—Parity Enable (PE): In asynchronous mode, this bit enables or disables the addition of a
parity bit to transmit data, and the checking of the parity bit in receive data. In synchronous mode
the parity bit is neither added nor checked, regardless of the PE setting.
Bit 5
PE Description
0 Parity bit not added or checked
1 Parity bit added and checked*
Note: * When PE is set to 1, an even or odd parity bit is added to transmit data according to the
even or odd parity mode selected by the O/E bit, and the parity bit in receive data is
checked to see that it matches the even or odd mode selected by the O/E bit.
(C/A): Selects whether the SCI operates in asynchronous or
444
(Initial value)
(Initial value)
(Initial value)