2.5.4. The optional external event input

Your device might include an external event input signal. Peripherals can drive this signal, either to wake the processor from WFE, or to set the internal WFE event register to one to indicate that the processor must not enter sleep mode on a later WFE instruction. See Wait for event for more information.

Copyright © 2015, 2018 Arm. All rights reserved.ARM DUI 0646C