Datasheet

Appendix B Internal I/O Registers
Rev. 6.00 Aug 04, 2006 page 581 of 680
REJ09B0145-0600
SDRU—Serial Data Register U H'A2 SCI1
Bit
Initial value
Read/Write
7
SDRU7
Undefined
R/W
6
SDRU6
Undefined
R/W
5
SDRU5
Undefined
R/W
4
SDRU4
Undefined
R/W
3
SDRU3
Undefined
R/W
0
SDRU0
Undefined
R/W
2
SDRU2
Undefined
R/W
1
SDRU1
Undefined
R/W
Used for transmit data setting and receive data storage
8-bit transfer mode: Not used
16-bit transfer mode: Upper 8 bits of data re
g
ister
SDRL—Serial Data Register L H'A3 SCI1
Bit
Initial value
Read/Write
7
SDRL7
Undefined
R/W
6
SDRL6
Undefined
R/W
5
SDRL5
Undefined
R/W
4
SDRL4
Undefined
R/W
3
SDRL3
Undefined
R/W
0
SDRL0
Undefined
R/W
2
SDRL2
Undefined
R/W
1
SDRL1
Undefined
R/W
Used for transmit data setting and receive data storage
8-bit transfer mode: Data register
16-bit transfer mode: Lower 8 bits of data register