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about dmac ip core

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Posts: 11
Registered: ‎03-19-2015

about dmac ip core

I am using xilinx dmac IP in PL ,use simple dma(S/G DMA not check, micro DMA not check),set burst length 256, data width 128, the problem is when I set transfer length more than 1000, the can not  not be started , why?