Renesas H8/3847R Series Hardware Manual page 619

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