Direct memory access controller and operating method thereof

An operating method of a direct memory access (DMA) controller including first and second DMA channels and a channel loop management memory device, comprising:

• (a) iteratively performing a DMA transfer operation of the first DMA channel based upon loop information and transfer information of the first DMA channel;
• (b) iteratively performing a DMA transfer operation of the second DMA channel based upon loop information and transfer information of the second DMA channel;
• (c) evaluating a whole channel loop number register indicating a number of remaining whole channel loops;
• (d) when the whole channel loop number register indicates one or more remaining whole channel loops,
• reconfiguring the transfer and loop information of the first and second DMA channels using data from the channel loop management memory device,
• updating the whole channel loop number register, and
• again performing the steps (a) through (d) based upon the reconfigured transfer and loop information of the first and second DMA channels;
• and
• performing step (d) only after both of steps (a) and (b) are ended.