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HC05V7GRS/D 数据表(PDF) 44 Page - NXP Semiconductors |
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HC05V7GRS/D 数据表(HTML) 44 Page - NXP Semiconductors |
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44 / 170 page ![]() SECTION 5: INTERRUPTS Page 30 MC68HC05V7 Specification Rev. 1.0 The M68HC05 CPU does not support interruptible instructions, therefore, the maximum latency to the first instruction of the interrupt service routine must include the longest instruction execution time plus stacking overhead. Latency = (Longest instruction execution time + 10) x tCYC secs An RTI instruction is used to signify when the interrupt software service routine is completed. The RTI instruction causes the register contents to be recovered from the stack and normal processing to resume at the next instruction that was to be executed when the interrupt took place. Figure 5-1 shows the sequence of events that occur during interrupt processing. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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