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PM0215 数据表(PDF) 66 Page - STMicroelectronics |
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PM0215 数据表(HTML) 66 Page - STMicroelectronics |
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66 / 91 page  The STM32 Cortex-M0 instruction set PM0215 66/91 Doc ID 022979 Rev 1 3.7.8 NOP No operation. Syntax NOP Operation NOP does nothing. NOP is not necessarily a time-consuming NOP. The processor might remove it from the pipeline before it reaches the execution stage. Use NOP for padding, for example to place the following instruction on a 64-bit boundary. Restrictions None Condition flags This instruction does not change the flags. Examples NOP ; No operation 3.7.9 SEV Send event. Syntax SEV Operation SEV is a hint instruction that causes an event to be signaled to all processors within a multiprocessor system. It also sets the local event register to 1, see Power management on page 28 and WFE on page 67. Restrictions None Condition flags This instruction does not change the flags. Examples SEV ; Send Event |
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