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HCS12 датащи(PDF) 251 Page - Freescale Semiconductor, Inc |
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HCS12 датащи(HTML) 251 Page - Freescale Semiconductor, Inc |
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251 / 452 page ![]() Glossary S12CPUV2 Reference Manual, Rev. 4.0 Freescale Semiconductor 251 Operation: (SP) – $0002 ⇒ SP (YH : YL) ⇒ M(SP) :M(SP+1) Description: Stacks the content of index register Y. The stack pointer is decremented by two. The content of Y is then stored at the address to which the SP points. After PSHY executes, the SP points to the stacked value of the high-order half of Y. Push instructions are commonly used to save the contents of one or more CPU registers at the start of a subroutine. Complementary pull instructions can be used to restore the saved CPU registers just before returning from the subroutine. PSHY Push Index Register Y onto Stack PSHY CCR Details: S X HIN Z V C –––––––– Source Form Address Mode Object Code Access Detail HCS12 M68HC12 PSHY INH 35 OS OS |
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