Renesas H8 Series Hardware Manual page 613

TDR—Transmit Data Register
Bit 7
TDR7
Initial value 1
Read/Write R/W
6 5
TDR6 TDR5 TDR4
1 1
R/W R/W R/W
Data for transfer to TSR
Appendix B Internal I/O Registers
H'AB
4 3 2
TDR3 TDR2
1 1 1
R/W R/W
Rev. 7.00 Mar 10, 2005 page 571 of 652
SCI3
1 0
TDR1 TDR0
1 1
R/W R/W
REJ09B0042-0700