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The drawing shows the different blocks in the memory map of the LPC29xx that are supported by the GPDMA. Notice that the DMA interface to TCM occupies a special space in the memory map. The DMA features eight DMA channels with a 4-word FIFO each, and support for 8-, 16- and 32-bit transactions. The SPI interface provides both single and burst requests whereas the UARTs support only burst requests. Scatter or gather DMA is supported through the use of linked lists. This means that the source and destination areas do not have to occupy contiguous areas of memory.
PTM Published on: 2011-11-02
