HD64F38024HV Datasheet, PDF (52/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 2 CPU
2.3.1 Data Formats in General Registers
Data of all the sizes above can be stored in general registers as shown in figure 2.3.
Data Type Register No.
Data Format
1-bit data
7
0
RnH 7 6 5 4 3 2 1 0
Don't care
1-bit data
RnL
Don't care
7
0
76543210
Byte data
7
RnH MSB
0
LSB
Don't care
7
0
Byte data
RnL
Don't care
MSB
LSB
15
0
Word data
Rn MSB
LSB
4-bit BCD data
RnH
7
4
Upper digit
3
0
Lower digit
Don't care
4-bit BCD data RnL
Don't care
7
4
Upper digit
3
0
Lower digit
[Legend]
RnH: Upper byte of general register
RnL: Lower byte of general register
MSB: Most significant bit
LSB: Least significant bit
Figure 2.3 Register Data Formats
Rev. 8.00 Mar. 09, 2010 Page 30 of 658
REJ09B0042-0800