p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 68

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 2 CPU
2.5
The H8S/2000 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
Figure 2.9 shows the data formats of general registers.
Rev. 1.00 Sep. 21, 2006 Page 30 of 658
REJ09B0310-0100
Data Formats
General Register Data Formats
Data Type
1-bit data
1-bit data
4-bit BCD data
4-bit BCD data
Byte data
Byte data
Figure 2.9 General Register Data Formats (1)
Register Number
RnH
RnL
RnH
RnL
RnH
RnL
MSB
Data Image
7
7
7
7
Upper
6 5 4 3 2
Don't care
Don't care
Don't care
4 3
Lower
1 0
LSB
0
0
0
MSB
7
7
7
7
Upper
6 5 4 3 2
Don't care
Don't care
Don't care
4 3
Lower
1 0
LSB
0
0
0