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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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H8/3021 数据表(PDF) 47 Page - Renesas Technology Corp |
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H8/3021 数据表(HTML) 47 Page - Renesas Technology Corp |
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47 / 712 page  2. CPU Rev.2.00 Mar. 22, 2007 Page 23 of 684 REJ09B0352-0200 2.5 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. 2.5.1 General Register Data Formats Figures 2.6 and 2.7 show the data formats in general registers. 7 RnH RnL RnH RnL RnH RnL 1-bit data 1-bit data 4-bit BCD data 4-bit BCD data Byte data Byte data 65 4 3 2 1 0 70 Don't care 7 6 5 4 32 10 70 Don't care Don't care 70 43 Lower digit Upper digit 7 43 Lower digit Upper digit Don't care 0 70 Don't care MSB LSB Don't care 70 MSB LSB Data Type Data Format General Register Legend RnH: RnL: General register RH General register RL Figure 2.6 General Register Data Formats |
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