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User manual Rev. 3 — 20 December 2013 719 of 841
NXP Semiconductors
UM10360
Chapter 34: Appendix: Cortex-M3 user guide
34.2.10.4 DSB
Data Synchronization Barrier.
34.2.10.4.1 Syntax
DSB{cond}
where:
cond is an optional condition code, see Section 34.2.3.7 “
Conditional execution”.
34.2.10.4.2 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.
34.2.10.4.3 Condition flags
This instruction does not change the flags.
34.2.10.4.4 Examples
DSB ; Data Synchronisation Barrier
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