A.1.4. Request and acknowledge

Table A.4 shows the request and acknowledge signals.

Table A.4. Request and acknowledge signals

SignalTypeSource or DestinationDescription
IECMAXPERFInputInterrupt controllerRequest to go to maximum performance level
IECWFIACKInputCPUAcknowledge indicating CPU has entered WFI mode. This signal must be connected to the STANDBYWFI output of an ARM core.
Copyright © 2003, 2008 ARM Limited. All rights reserved.ARM DDI 0304C