Wfe - ST STM32H7 Series Programming Manual

PM0214
3.11.11

WFE

Wait For Event. WFE is a hint instruction.
Syntax
WFE{cond}
Where: 'cond' is an optional condition code, see
Operation
If the event register is 0, WFE suspends execution until one of the following events occurs:
•
An exception, unless masked by exception mask registers or the current priority level
•
An exception enters Pending state, if SEVONPEND in System Control Register is set
•
A Debug Entry request, if Debug is enabled
•
An event signaled by a peripheral or another processor in a multiprocessor system
using the SEV instruction.
If the event register is 1, WFE clears it to 0 and returns immediately.
For more information see
Condition flags
This instruction does not change the flags.
Examples
WFE
Power management on page
; Wait for event
The STM32 Cortex-M4 instruction set
Conditional execution on page
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