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PM0223 数据表(PDF) 70 Page - STMicroelectronics |
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PM0223 数据表(HTML) 70 Page - STMicroelectronics |
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70 / 110 page  The STM32L0 Cortex-M0+ Instruction Set PM0223 70/110 DocID025763 Rev 1 3.7.2 CPS Change Processor State. Syntax CPSID i CPSIE i Operation CPS changes the PRIMASK special register values. CPSID causes interrupts to be disabled by setting PRIMASK. CPSIE cause interrupts to be enabled by clearing PRIMASK. See Exception mask register on page 17 for more information about these registers. Restrictions If the current mode of execution is not privileged, then this instruction behaves as a NOP and does not change the current state of PRIMASK. Condition flags This instruction does not change the condition flags. Examples CPSID i ; Disable all interrupts except NMI (set PRIMASK.PM) CPSIE i ; Enable interrupts (clear PRIMASK.PM) |
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