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A.6 WFE and WFI Standby signals

List of WFI and WFE Standby mode signals.

Table A-8 Standby and wait for event signals

Name I/O

Source or

Destination

Description
EVENTI I External coherent agent

Event input for Cortex®‑A9 processor to wake up from WFE Standby mode.

EVENTO O

Event output. This signal is active when one SEV instruction is executed.

STANDBYWFE[N:0] O Power controller

Indicates if a Cortex‑A9 processor is in WFE Standby mode.

0Processor not in WFE Standby mode.
1Processor in WFE Standby mode.
STANDBYWFI[N:0] O

Indicates that a Cortex‑A9 processor is in WFI Standby mode.

0Processor not in WFI Standby mode.
1Processor in WFI Standby mode.
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