SH7280 Datasheet, PDF (883/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 17 Serial Communication Interface with FIFO (SCIF)
17.3.13 Serial Extended Mode Register (SCSEMR)
SCSEMR is an 8-bit register that extends the SCIF functions. The transfer rate can be doubled by
setting the basic clock in asynchronous mode.
Be sure to set this register to H'00 in clocked synchronous mode. SCSEMR is initialized to H'00
by a power-on reset.
Bit: 7
6
5
4
3
2
1
0
ABCS -
-
-
-
-
-
-
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
Bit
7
6 to 0
Bit Name
ABCS
—
Initial
Value
0
All 0
R/W
R/W
R/W
Description
Asynchronous Basic Clock Select
Selects the basic clock for 1-bit period in
asynchronous mode.
Setting of ABCS is valid when the asynchronous
mode bit (C/A in SCSMR) = 0.
0: Basic clock with a frequency of 16 times the
transfer rate
1: Basic clock with a frequency of 8 times the transfer
rate
Reserved
These bits are always read as 0. The write value
should always be 0.
Rev. 1.00 Jun. 26, 2008 Page 853 of 1692
REJ09B0393-0100