SH7615 Datasheet, PDF (608/925 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH
RISC engine Family/SH7600 Series

14.2.5 Serial Mode Register (SCSMR)
Bit: 7
C/A
Initial value: 0
R/W: R/W
6
CHR/
ICK3
0
R/W
5
PE/
ICK2
0
R/W
4
3
2
O/E/ STOP/ MP
ICK1 ICK0
0
0
0
R/W R/W R/W
1
CKS1
0
CKS0
0
0
R/W R/W
The serial mode register (SCSMR) is an 8-bit register used to set the SCIF’s serial communication
format and select the baud rate generator clock source. In IrDA communication mode, it is used to
select the output pulse width.
SCSMR can be read or written to by the CPU at all times.
SCSMR is initialized to H'00 by a reset, by the module standby function, and in standby mode.
Bit 7—Communication Mode (C/A): Selects asynchronous mode or synchronous mode as the
SCIF operating mode. In IrDA communication mode, this bit must be cleared to 0.
Bit 7: C/A
0
1
Description
Asynchronous mode
Synchronous mode
(Initial value)
Bit 6—Character Length (CHR)/IrDA Clock Select 3 (ICK3): 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
1
7-bit data^*
(Initial value)
Note: * When 7-bit data is selected, the MSB (bit 7) of the transmit FIFO data register
(SCFTDR) is not transmitted.
In IrDA communication mode, bit 6 is the IrDA clock select 3 (ICK3) bit, enabling appropriate
clock pulses to be generated according to its setting. See Pulse Width Selection, in section 14.3.6,
Operation in IrDA Mode, for details.
Rev. 2.00, 03/05, page 570 of 884