Abstract: An audio device and a method of operating the same are provided. The audio device includes a storage unit, a first memory and a second memory, a hardware decoder, a software decoder, a first direct memory access (DMA) block, a second DMA block, and a controller. The controller converts the audio device from an ultra low power mode in which the first PCM information is transmitted to an audio interface buffer through the first memory, the hardware decoder, and the first DMA block or a low power mode in which the second PCM information is transmitted to the audio interface buffer through the second memory, the software decoder, and the first DMA block to a normal mode in which the second PCM information is transmitted to the audio interface buffer through the second memory, the software decoder, and the second DMA block.

Abstract: A data processing system includes an audio processor with a main memory for storing data, first and second buffers for temporarily storing the data to input/output an audio signal, and a data input/output (I/O) unit for outputting the stored data. A direct memory access (DMA) controller is provided for transmitting data between the main memory and the first and second buffers according to a DMA transmission process. If transmission of the data stored in the first buffer ends and an interrupt signal is thus generated, the DMA controller increases sizes of the first and second buffers during transmission of the data stored in the second buffer.

Abstract: An audio device and a method of operating the same are provided. The audio device includes a storage unit, a first memory and a second memory, a hardware decoder, a software decoder, a first direct memory access (DMA) block, a second DMA block, and a controller. The controller converts the audio device from an ultra low power mode in which the first PCM information is transmitted to an audio interface buffer through the first memory, the hardware decoder, and the first DMA block or a low power mode in which the second PCM information is transmitted to the audio interface buffer through the second memory, the software decoder, and the first DMA block to a normal mode in which the second PCM information is transmitted to the audio interface buffer through the second memory, the software decoder, and the second DMA block.

Abstract: A data processing system includes an audio processor with a main memory for storing data, first and second buffers for temporarily storing the data to input/output an audio signal, and a data input/output (I/O) unit for outputting the stored data. A direct memory access (DMA) controller is provided for transmitting data between the main memory and the first and second buffers according to a DMA transmission process. If transmission of the data stored in the first buffer ends and an interrupt signal is thus generated, the DMA controller increases sizes of the first and second buffers during transmission of the data stored in the second buffer.