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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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HCS12 数据表(PDF) 117 Page - Freescale Semiconductor, Inc |
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HCS12 数据表(HTML) 117 Page - Freescale Semiconductor, Inc |
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117 / 452 page  S12CPUV2 Reference Manual, Rev. 4.0 Freescale Semiconductor 117 Operation: Description: Shifts all bits of accumulator B one place to the right. Bit 7 is held constant. Bit 0 is loaded into the C status bit. This operation effectively divides a two’s complement value by two without changing its sign. The carry bit can be used to round the result. ASRB Arithmetic Shift Right B ASRB C b7 – – – – – – b0 CCR Details: S X HIN Z V C –––– ∆∆∆∆ N: Set if MSB of result is set; cleared otherwise Z: Set if result is $00; cleared otherwise V: N ⊕ C = [N • C] + [N • C] (for N and C after the shift) Set if (N is set and C is cleared) or (N is cleared and C is set); cleared otherwise (for values of N and C after the shift) C: B0 Set if the LSB of B was set before the shift; cleared otherwise Source Form Address Mode Object Code Access Detail HCS12 M68HC12 ASRB INH 57 O O |
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