Direct memory access control device for a ring buffer

摘要

A DMA control device for generating an address value to a ring buffer according to the present invention is provided with an address generation circuit for generating address signals to the ring buffer sequentially by providing an initial value with an address value within a range where the ring buffer is set, and a corrected address generation circuit for initializing the address generation circuit by use of a value obtained by subtracting the total number of addresses of the ring buffer from an address value of the address signals generated from the address generation circuit when the address value of the address signals exceeds a final address of the ring buffer.