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The sleep-state to operating-state sequence is as follows:
1. A short press of the
On/Off/Soft Reset
button, less than two seconds.
2. The
System Control Processor
(SCP) enables the Cortex-A72, Cortex-A53, VSYS, and the
Mali-T624 GPU.
3. The SCP performs basic Juno r2 SoC setup, PLLs, internal clocks, and test chip peripherals.
4. The SCP writes state data to on-chip secure RAM so that the application cluster, that is, either the
Cortex-A72 or Cortex-A53, resumes in the correct state and does not boot up from standby.
5. The SCP releases the
Power Policy Unit
(PPU) to start the application cluster boot sequence.
6. The application code resumes from the point when the Juno r2 SoC went into the sleep-state.
3 Configuration
3.2 Configuration process and operating modes
ARM 100114_0200_03_en
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