ARM Cortex A9 - WFE and WFI Standby Signals

Signal Descriptions
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A.5 WFE and WFI standby signals
Table A-6 shows the WFE and WFI standby signals.
See Standby modes on page 2-11.
Table A-6 WFE and WFI standby signals
Name I/O
Source or
destination
Description
EVENTI I External
coherent
agent
Event input for Cortex-A9 processor wake-up from WFE mode.
EVENTO O Event output. This signal is active-HIGH for one processor clock cycle when an SEV
instruction is executed.
STANDBYWFE O Power
controller
Indicates if the processor is in WFE mode:
0 Processor not in WFE standby mode.
1 Processor in WFE standby mode.
STANDBYWFI O Indicates if the processor is in WFI mode:
0 Processor not in WFI standby mode.
1 Processor in WFI standby mode.