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Arm Cortex-A55 Core Technical Reference Manual : Off (emulated)

Off (emulated)

In this mode, all core domain logic and RAMs are kept on. However, core warm reset can be asserted externally to emulate a power off scenario while keeping core debug state and allowing debug access.

All debug registers must retain their mode and be accessible from the external debug interface. All other functional interfaces behave as if the core were Off.