Datasheet

Section 2 CPU
R01UH0166EJ0600 Rev. 6.00 Page 63 of 1434
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
2.5 Data Formats
The CPU can process 1-bit, 4-bit (BCD), 8-bit (byte), 16-bit (word), and 32-bit (longword) data.
Bit-manipulation instructions operate on 1-bit data by accessing bit n (n = 0, 1, 2, …, 7) of byte
operand data. The DAA and DAS decimal-adjust instructions treat byte data as two digits of 4-bit
BCD data.
2.5.1 General Register Data Formats
Figure 2.10 shows the data formats in general registers.
76543210 Don’t care
70
Don’t care 76543210
43
70
70
Don’t careUpper Lower
LSB
MSB LSB
Data Type Register Number Data Format
1-bit data
1-bit data
4-bit BCD data
4-bit BCD data
Byte data
Byte data
RnH
RnL
RnH
RnL
RnH
RnL
MSB
Don’t care
Upper
Lower
43
70
Don’t care
70
Don’t care
70
Figure 2.10 General Register Data Formats