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Cortex-A9 MPCore power domains

The Cortex®‑A9 MPCore processor can support up to 14 power domains.

The supported power domains are the following:

  • Four power domains, one for each of the Cortex‑A9 processors, apart from their Data Engines.
  • Four power domains, one for each of the Cortex‑A9 processor Data Engines.
  • Four power domains, one for each of the Cortex‑A9 processor caches and TLB RAMs.
  • One power domain for SCU duplicated TAG RAMs.
  • One power domain for remaining logic, the SCU logic cells, and private peripherals.

The following figure shows the power domains and where placeholders are inserted for power domain isolation.

Figure 5-2 Cortex‑A9 MPCore power domains and clamps


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