Datasheet

Section 15 Serial Communication Interface (SCI and IrDA)
Rev. 3.00 Mar 21, 2006 page 368 of 788
REJ09B0300-0300
15.3.8 Serial Interface Mode Register (SCMR)
SCMR selects SCI functions and its format.
Bit Bit Name Initial Value R/W Description
7 to
4
— All 1 R Reserved
These bits are always read as 1 and cannot be
modified.
3 SDIR 0 R/W Data Transfer Direction
Selects the serial/parallel conversion format.
0: TDR contents are transmitted with LSB-first.
Receive data is stored as LSB first in RDR.
1: TDR contents are transmitted with MSB-first.
Receive data is stored as MSB first in RDR.
The SDIR bit is valid only when the 8-bit data format
is used for transmission/reception; when the 7-bit
data format is used, data is always
transmitted/received with LSB-first.
2 SINV 0 R/W Data Invert
Specifies inversion of the data logic level. The SINV
bit does not affect the logic level of the parity bit.
When the parity bit is inverted, invert the O/E bit in
SMR.
0: TDR contents are transmitted as they are.
Receive data is stored as it is in RDR.
1: TDR contents are inverted before being
transmitted. Receive data is stored in inverted
form in RDR.
1— 1 R Reserved
This bit is always read as 1 and cannot be modified.
0 SMIF 0 R/W Serial Communication Interface Mode Select:
0: Normal asynchronous or clocked synchronous
mode
1: Reserved mode