PM0223 datasheet(79/110 Pages) STMICROELECTRONICS

部件名	PM0223

功能描述	This programming manual provides information for application and system-level software developers

PDF	110 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

79 / 110 page

DocID025763 Rev 1

79/110

PM0223

The STM32L0 Cortex-M0+ Instruction Set

3.7.11

WFE

Wait For Event.

Syntax

WFE

Operation

If the event register is 0, WFE suspends execution until one of the following events occurs:

•

An exception, unless masked by the exception mask registers or the current priority

level.

•

An exception enters the Pending state, if SEVONPEND in the 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 completes immediately.

For more information see 2.5: Power management on page 33.

Note:

WFE

is intended for power saving only. When writing software assume that WFE might

behave as NOP.

Restrictions

There are no restrictions.

Condition flags

This instruction does not change the flags.

Examples

WFE

; Wait for event

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