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HD6432142 Scheda tecnica(PDF) 93 Page - Renesas Technology Corp

Il numero della parte HD6432142
Spiegazioni elettronici  Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series
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Produttore elettronici  RENESAS [Renesas Technology Corp]
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HD6432142 Scheda tecnica(HTML) 93 Page - Renesas Technology Corp

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Section 2 CPU
Rev. 4.00 Sep 27, 2006 page 49 of 1130
REJ09B0327-0400
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 digit Lower digit
LSB
MSB
LSB
Data Type
General Register
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 digit Lower digit
43
70
Don’t care
70
Don’t care
70
Figure 2.10 General Register Data Formats



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