Renesas F-ZTAT H8 Series Hardware Manual page 506

Appendix B Internal I/O Registers
TDR—Transmit data register
Bit
TDR7
Initial value
Read/Write R/W
Rev.3.00 Jul. 19, 2007 page 480 of 532
REJ09B0397-0300
7 6 5
TDR6 TDR5
1 1 1
R/W R/W
4 3
TDR4 TDR3
1 1
R/W R/W
Data to be transferred to TSR
H'AB
2 1
TDR2 TDR1
1 1
R/W R/W
SCI3
0
TDR0
1
R/W