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汇编指令NOP占用几个周期



F28069 我用XDS100仿真,用CCSV5 中的CLOCK查看。下图,第一个NOP 占用一个CLK,    第二到第三个,都是占用16

4个NOP占用的周期数是1+16+16+16=49 ,我用72M时钟,用示波器看到的,也是49*13.88=680ns

是不是哪里理解错了?谢谢

#define  NOP __asm(" NOP")