ARM Technical Support Knowledge Articles

What happens if a DMA block and the core try to access the same item in the DTCM ?

Applies to: ARM968E-S

Answer

The DMA has priority.

If both the core and the DMA need to access an odd or even address at the same time, the core will be wait stated.  When the DMA moves to the next address then the core will begin and they will be able to access TCM address space simultaneously (one at odd addresses and the other at even addresses).

Article last edited on: 2008-09-09 15:47:46

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