Dsb - ST STM32F3 Series Programming Manual

The STM32 Cortex-M4 instruction set
3.11.4

DSB

Data synchronization barrier.
Syntax
DSB{cond}
Where: 'cond' is an optional condition code, see
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.
Condition flags
This instruction does not change the flags.
Examples
DSB ; Data Synchronisation Barrier
184/262
Conditional execution on page
PM0214 Rev 10
PM0214
65.