NXP Semiconductors LPC1769 - Dmb; Syntax; Operation; Condition Flags

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User manual Rev. 3 — 20 December 2013 718 of 841
NXP Semiconductors
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Chapter 34: Appendix: Cortex-M3 user guide
34.2.10.3 DMB
Data Memory Barrier.
34.2.10.3.1 Syntax
DMB{cond}
where:
cond is an optional condition code, see Section 34.2.3.7 “
Conditional execution”.
34.2.10.3.2 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.
34.2.10.3.3 Condition flags
This instruction does not change the flags.
34.2.10.3.4 Examples
DMB ; Data Memory Barrier