SH7751 Datasheet, PDF (707/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

15. Serial Communication Interface (SCI)
15.2.5 Serial Mode Register (SCSMR1)
Bit:
7
6
5
4
3
2
1
0
C/A
CHR
PE
O/E
STOP
MP
CKS1 CKS0
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
SCSMR1 is an 8-bit register used to set the SCI's serial transfer format and select the baud rate
generator clock source.
SCSMR1 can be read or written to by the CPU at all times.
SCSMR1 is initialized to H'00 by a power-on reset or manual reset, in standby mode, and in the
module standby state.
Bit 7—Communication Mode (C/A): Selects asynchronous mode or synchronous mode as the
SCI operating mode.
Bit 7: C/A
0
1
Description
Asynchronous mode
Synchronous mode
(Initial value)
Bit 6—Character Length (CHR): Selects 7 or 8 bits as the data length in asynchronous mode. In
synchronous mode, a fixed data length of 8 bits is used regardless of the CHR setting,
Bit 6: CHR
Description
0
8-bit data
(Initial value)
1
7-bit data*
Note: * When 7-bit data is selected, the MSB (bit 7) of SCTDR1 is not transmitted.
Rev.4.00 Oct. 10, 2008 Page 609 of 1122
REJ09B0370-0400