HD6433044 Datasheet, PDF (455/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

Bit 7—Communication Mode (C/A): Selects whether the SCI operates in asynchronous or
synchronous mode.
Bit 7
C/A
0
1
Description
Asynchronous mode
Synchronous mode
(Initial value)
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.
(Initial value)
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
(Initial value)
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.
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