Amba Dedicated Dma Controller with Multiple Masters Using Vhdl

This paper describes implementation of DMA controller of AMBA Bus with two masters using VHDL. DMA controller is a synthesizable soft IP core connected to the AMBA AHB Bus for easy integration into SOC implementation. The Direct Memory Access (DMA) Controller is a hardware feature that enables movement of blocks of data from peripheral to memory, memory to peripheral or memory to memory. This movement of data by a separate entity significantly reduces the load on the processor. A DMA controller can be used to save power in a system by putting the CPU in a low power state and using the DMA controller (fewer gates/transactions) to move the data. The simulation results obtained indicate bidirectional memory read and write operation of AMBA AHB DMA controller. The proposed architecture provides bus access to any one master at a time for improved speed and performance.