HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 68

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

2. CPU
2.5
The H8/300H 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
Figures 2.6 and 2.7 show the data formats in general registers.
Rev.4.00 Aug. 20, 2007 Page 24 of 638
REJ09B0395-0400
General Register Data Formats
Data Formats
Data Type
1-bit data
1-bit data
4-bit BCD data
4-bit BCD data
Byte data
Byte data
Legend:
RnH: General register RH
RnL: General register RL
MSB: Most significant bit
LSB: Least significant bit
Figure 2.6 General Register Data Formats (1)
General
Register
RnH
RnL
RnH
RnL
RnH
RnL
MSB
Data Format
7
7
7
7
Upper digit
6 5 4 3 2 1 0
Don't care
Don't care
Don't care
4 3
Lower digit
LSB
0
0
0
MSB
7
7 6 5 4 3 2 1 0
7
7
Upper digit
Don't care
Don't care
Don't care
4 3
Lower digit
LSB
0
0
0