HD6433308 Datasheet, PDF (48/349 Pages) Hitachi Semiconductor – Hitachi Single-Chip MicroComputer

3.4.1 Data Formats in General Registers
Data of all the sizes above can be stored in general registers as shown in figure 3-3.
Data type
1-Bit data
Register No.
RnH
Data format
7
0
765 43210
Don't-care
1-Bit data
RnL
7
0
Don't-care 7 6 5 4 3 2 1 0
Byte data
RnH
7
0
M
L
S
B
S
B
Don't-care
Byte data
RnL
7
0
M
L
Don't-care
S
B
S
B
15
0
M
L
Word data
Rn
S
B
S
B
4-Bit BCD data
RnH
7 43 0
Upper digit Lower digit
Don't-care
4-Bit BCD data
RnL
7 43 0
Don't-care ^{Upper digit Lower digit}
Figure 3-3. Register Data Formats
Note:
RnH: Upper digit of general register
RnL: Lower digit of general register
MSB: Most significant Bit
LSB: Least significant Bit
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