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Will cache memory referred and rewritten if address is in cache area?

Latest Updated:03/24/2009

Question:

In DMA transfers, if a designated address is in the cache effective area, will a cache memory be referred and rewritten?

Answer:

No, it is impossible to refer and rewrite a cache memory by DMA transfers.
If a transfer is performed to the external memory designated in the cache effective area by the DMAC, please secure the coherency of the cache memory and the external memory by software.
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