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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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H8/3003 数据表(PDF) 44 Page - Renesas Technology Corp |
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H8/3003 数据表(HTML) 44 Page - Renesas Technology Corp |
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44 / 715 page  Figure 2-7 General Register Data Formats (2) 2.5.2 Memory Data Formats Figure 2-8 shows the data formats on memory. The H8/300H CPU can access word data and longword data on memory, but word or longword data must begin at an even address. If an attempt is made to access word or longword data at an odd address, no address error occurs but the least significant bit of the address is regarded as 0, so the access starts at the preceding address. This also applies to instruction fetches. Rn En ERn Word data Word data Longword data 15 0 MSB LSB General Register Data Type Data Format 15 0 MSB LSB 31 16 MSB 15 0 LSB Legend ERn: En: Rn: RnH: RnL: MSB: LSB: General register General register E General register R General register RH General register RL Most significant bit Least significant bit 26 |
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