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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PM0056 датащи(PDF) 102 Page - STMicroelectronics |
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PM0056 датащи(HTML) 102 Page - STMicroelectronics |
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102 / 156 page  The Cortex-M3 instruction set PM0056 102/156 DocID15491 Rev 5 When you write to BASEPRI_MAX, the instruction writes to BASEPRI only if either: • Rn is non-zero and the current BASEPRI value is 0 • Rn is non-zero and less than the current BASEPRI value. See MRS on page 100. Restrictions Rn must not be SP and must not be PC. Condition flags This instruction updates the flags explicitly based on the value in Rn. Examples MSR CONTROL, R1 ; Read R1 value and write it to the CONTROL register 3.9.8 NOP No Operation. Syntax NOP{cond} where: • ‘cond’ is an optional condition code, see Conditional execution on page 57. 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. Condition flags This instruction does not change the flags. Examples NOP ; No operation 3.9.9 SEV Send Event. Syntax SEV{cond} where: • ‘cond’ is an optional condition code, see Conditional execution on page 57. |
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