Datasheet

Section 15 Serial Communication Interface (SCI, IrDA)
Rev.7.00 Mar. 18, 2009 page 721 of 1136
REJ09B0109-0700
15.3.11 Serial Extension Mode Register (SEMR)
SEMR selects the clock source in asynchronous mode. The basic clock can be automatically set by
selecting the average transfer rate.
Bit Bit Name Initial Value R/W Description
7
to
4
⎯ Undefined ⎯ Reserved
If these bits are read, an undefined value will be
returned and cannot be modified.
3 ABCS 0 R/W Asynchronous basic clock selection (valid only in
asynchronous mode)
Selects the basic clock for 1-bit period in
asynchronous mode.
0: Operates on a basic clock with a frequency of
16 times the transfer rate.
1: Operates on a basic clock with a frequency of 8
times the transfer rate.