Hitachi H8/3937 Series Hardware Manual page 444

TDR31—Transmit data register 31
Bit 7
TDR317
Initial value 1
Read/Write R/W
432
6 5
TDR316 TDR315 TDR314
1 1
R/W R/W
Data for transfer to TSR
H'9B
4 3 2
TDR313 TDR312
1 1 1
R/W R/W R/W
SCI31
1 0
TDR311 TDR310
1 1
R/W R/W