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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) 255 Page - Freescale Semiconductor, Inc |
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HCS12 数据表(HTML) 255 Page - Freescale Semiconductor, Inc |
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255 / 452 page  Glossary S12CPUV2 Reference Manual, Rev. 4.0 Freescale Semiconductor 255 Operation: (M(SP) : M(SP+1)) ⇒ A : B (SP) + $0002 ⇒ SP Description: Double accumulator D is loaded from the address indicated by the stack pointer. The SP is then incremented by two. The order in which A and B are pulled from the stack is the opposite of the order in which A and B are pulled when an RTI instruction is executed. The interrupt stacking order for A and B is backward-compatible with the M6800, which had no 16-bit accumulator. Pull instructions are commonly used at the end of a subroutine to restore the contents of CPU registers that were pushed onto the stack before subroutine execution. PULD Pull Double Accumulator from Stack PULD CCR Details: S X HIN Z V C –––––––– Source Form Address Mode Object Code Access Detail HCS12 M68HC12 PULD INH 3A UfO UfO |
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