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H8S2245 数据表(PDF) 75 Page - Renesas Technology Corp

部件名 H8S2245
功能描述  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
PDF  818 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8S2245 数据表(HTML) 75 Page - Renesas Technology Corp

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Section 2 CPU
Rev.3.00 Mar. 26, 2007 Page 33 of 772
REJ09B0355-0300
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 care
Upper
Lower
LSB
MSB
LSB
Data Type
General Register
Data Image
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



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