HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 480

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

16.3.5
SCSMR is a 16-bit readable/writable register used to set the SCIF’s serial transfer format and
select the baud rate generator clock source and the sampling rate.
Rev. 1.00, 02/04, page 442 of 804
Bit
15 to
11
10
9
8
7
6
Bit Name

SRC2
SRC1
SRC0
C/A
CHR
Serial Mode Register (SCSMR)
Initial
Value
All 0
0
0
0
0
0
R/W
R
R/W
R/W
R/W
R/W
R/W
Communication Mode
Character Length
Description
Reserved
These bits are always read as 0. The write value should
always be 0. If 1 is written to these bits, correct operation
cannot be guaranteed.
Sampling Control
Select the sampling rate in asynchronous mode. This setting
is valid only in asynchronous mode.
000: Sampling rate 1/16
001: Sampling rate 1/5
010: Sampling rate 1/7
011: Sampling rate 1/11
100: Sampling rate 1/13
101: Sampling rate 1/17
110: Sampling rate 1/19
111: Sampling rate 1/27
Selects whether the SCI operates in the asynchronous or
clock synchronous mode.
0: Asynchronous mode
1: Clock synchronous mode
Selects seven or eight bits as the data length.
This setting is only valid in asynchronous mode. In clock
synchronous mode, the data length is always eight bits,
regardless of the CHR setting.
0: 8-bit data
1: 7-bit data*
Note: * When the 7-bit data is selected, the MSB bit (bit 7) in
the transmit FIFO data register (SCFTDR) is not
transmitted.