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PM0215 Datasheet(PDF) 63 Page - STMicroelectronics |
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PM0215 Datasheet(HTML) 63 Page - STMicroelectronics |
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63 / 91 page  PM0215 The STM32 Cortex-M0 instruction set Doc ID 022979 Rev 1 63/91 3.7.3 DMB Data memory barrier. Syntax DMB Operation DMB acts as a data memory barrier. It ensures that all explicit memory accesses that appear, in program order, before the DMB instruction are completed before any explicit memory accesses that appear, in program order, after the DMB instruction. DMB does not affect the ordering or execution of instructions that do not access memory. Restrictions None Condition flags This instruction does not change the flags. Examples DMB ; Data Memory Barrier 3.7.4 DSB Data synchronization barrier. Syntax DSB Operation DSB acts as a special data synchronization memory barrier. Instructions that come after the DSB, in program order, do not execute until the DSB instruction completes. The DSB instruction completes when all explicit memory accesses before it complete. Restrictions None Condition flags This instruction does not change the flags. Examples DSB ; Data Synchronisation Barrier |
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