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DMA scatter and gather

Question asked by Cecilia C on Nov 20, 2017
Latest reply on Nov 21, 2017 by David Tosenovjan

Hi,

What is the difference between using DMA scatter and gather and channel linking?

Does scatter and gather require an additional DMA service request to continue with the second TCD?

I am doing some tests on MPC5746R (triggering DMA transfers from eTPU) and as far as I understand with channel linking I can perform e g two transfers (two eTPU variables) on one service request whereas  with scatter and gather only one transfer is performed per DMA service request, is this correct?

 

Thanks,

Cecilia

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