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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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PM0044 数据表(PDF) 36 Page - STMicroelectronics |
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PM0044 数据表(HTML) 36 Page - STMicroelectronics |
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36 / 162 page  STM8 addressing modes PM0044 36/162 Doc ID 13590 Rev 3 6.3.1 Short Direct addressing mode The address is a byte, thus require only one byte after the op-code, but only allow 00..FF addressing space. Example: 004B 20 coeff dc.b $20 052D B64B LD A,coeff Action: A = (coeff) = ($4B) = $20 Figure 8. Short Direct addressing mode example Steps to Determine Effective Address PC = 052D PC = PC + 1 = 052E EA Before Completion Instruction Complete A = (EA) = 20 New PC = 052F After Completion = (PC) = (4B + 0000) = 004B 20 B6 4B LD A,Coeff A 004B EA 052D PC Previous Value A 20 052F New PC 004B 052D 052E 052F Coeff .byte 20h VR02059L 20 B6 4B 004B 052D 052E 052F Coeff .byte 20h LD A,Coeff PC +1 = |
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