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H8S/2224 Scheda tecnica(PDF) 162 Page - Renesas Technology Corp |
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H8S/2224 Scheda tecnica(HTML) 162 Page - Renesas Technology Corp |
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162 / 1071 page ![]() Section 2 CPU Rev. 5.00 Aug 08, 2006 page 76 of 982 REJ09B0054-0500 2.5 Data Formats 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 General Register Data Formats Figure 2.9 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 Data Type Register Number Data Format Byte data Byte data 4-bit BCD data 4-bit BCD data 1-bit data 1-bit data RnH RnL RnH RnL RnH RnL Upper Lower Upper Lower Figure 2.9 General Register Data Formats (1) |
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