ocram epdc not accessible by M4 when A7 is suspended.

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ocram epdc not accessible by M4 when A7 is suspended.

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vijaykumar_prat
Contributor II

Hi,

When A7 is suspended, M4 is unable to access the OCRAM EPDC. It is able to access normal OCRAM without any issues. We are trying to use OCRAM EPDC as general purpose ram. Please help us in this regard. We found out that IOMUXC_GPR_GPR1 register provides control to enable/disable ocram epdc function. Even we tried enabling it as well as disabling it also. Still M4 hangs while accessing OCRAM epdc when A7 is suspended. Please help us in this regard

Regards,

Vijay.

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jamesbone
NXP TechSupport
NXP TechSupport

When you are in Suspend Mode,  several Peripherals are removed from power and Clocks, this is the case of the EPDC, I don´t see a mode to prevent that EPDC does not go to sleep in the OCRAM only. Because it is part of the periheral.  You will need to maitain on the complete EPDC.  To keep a live the OCRAM of the EPDC.

 

Hope this clarifies.

 

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