iMX7D A7 core power down

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iMX7D A7 core power down

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sunildhaduk
Contributor IV

Hello,

I want to use M4 core only in iMX7D (Sabre Board) and want to shut down both A7 cores.

Please tell me which register settings will be required to put both A7 core in shut down?

How to power off A7 core, L2 controller and SCU supply using internal switches and using PMIC (PF3000)?

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Carlos_Musich
NXP Employee
NXP Employee

Hi Sunil,

you can set A7 cores to be in low power modes, but not power them off or turning their clocks off.

As you can see in Figure 5-15. CCM Clock Tree Root Slices of i.MX 7Dual Applications Processor Reference Manual there is no clock gate to the A7 cores as it is for the M4.

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Regards,
Carlos

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