Renesas F-ZTAT H8 Series Hardware Manual page 503

SDRU—Serial data register U
Bit
SDRU7
Initial value
Undefined
Read/Write R/W
SDRL—Serial data register L
Bit
SDRL7
Initial value
Undefined
Read/Write R/W
7 6 5
SDRU6 SDRU5
Undefined Undefined
R/W R/W
Used to set transmit data and store receive data
8-bit transfer mode:
16-bit transfer mode:
7 6 5
SDRL6 SDRL5
Undefined Undefined
R/W R/W
Used to set transmit data and store receive data
8-bit transfer mode:
16-bit transfer mode:
Appendix B Internal I/O Registers
H'A2
4 3
SDRU4 SDRU3 SDRU2
Undefined Undefined Undefined
R/W R/W
Not used
Upper 8 bits of data
H'A3
4 3
SDRL4 SDRL3 SDRL2
Undefined Undefined Undefined
R/W R/W
8-bit data
Lower 8 bits of data
Rev.3.00 Jul. 19, 2007 page 477 of 532
(H8/3857 Group only)
2 1
SDRU1 SDRU0
Undefined Undefined
R/W R/W R/W
(H8/3857 Group only)
2 1
SDRL1 SDRL0
Undefined Undefined
R/W R/W R/W
REJ09B0397-0300
SCI1
0
SCI1
0