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Appendix B Internal I/O Registers
SMR—Serial mode register
Bit
COM
Initial value
Read/Write
R/W
Multiprocessor mode
0 Multiprocessor communication function disabled
1 Multiprocessor communication function enabled
Stop bit length
0 1 stop bit
1 2 stop bits
Parity mode
0 Even parity
1 Odd parity
Parity enable
0 Parity bit adding and checking disabled
1 Parity bit adding and checking enabled
Character length
0 8-bit data
1 7-bit data
Communication mode
0 Asynchronous mode
1 Synchronous mode
BRR—Bit rate register
Bit
BRR7
Initial value
Read/Write
R/W
Rev.3.00 Jul. 19, 2007 page 478 of 532
REJ09B0397-0300
7
6
5
CHR
PE
0
0
0
R/W
R/W
7
6
5
BRR6
BRR5
1
1
1
R/W
R/W
H'A8
4
3
PM
STOP
MP
0
0
R/W
R/W
R/W
H'A9
4
3
BRR4
BRR3
BRR2
1
1
R/W
R/W
R/W
2
1
0
CKS1
CKS0
0
0
0
R/W
R/W
Clock select 0, 1
φ clock
0 0
φ/4 clock
1
φ/16 clock
1 0
φ/64 clock
1
2
1
0
BRR1
BRR0
1
1
1
R/W
R/W
SCI3
SCI3
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