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HD64F3687 Datasheet(PDF) 49 Page - Renesas Technology Corp

Part # HD64F3687
Description  Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
PDF  504 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD64F3687 Datasheet(HTML) 49 Page - Renesas Technology Corp

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Rev. 3.00, 05/03, page 19 of 472
2.3
Data Formats
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.
2.3.1
General Register Data Formats
Figure 2.5 shows the data formats in general registers.
70
70
MSB
LSB
MSB
LSB
70
43
Don't care
Don't care
Don't care
70
43
70
Don't care
65 43 2
71 0
70
Don't care
65 43 2
71 0
Don't care
RnH
RnL
RnH
RnL
RnH
RnL
Data Type
General Register
Data Format
Byte data
Byte data
4-bit BCD data
4-bit BCD data
1-bit data
1-bit data
Upper
Lower
Upper
Lower
Figure 2.5 General Register Data Formats (1)



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