公开(公告)号：US20080281999A1

公开(公告)日：2008-11-13

申请号：US11744961

申请日：2007-05-07

Applicant: Hsin-Yu Kang ,  Cheng-Ting Wu

Inventor： Hsin-Yu Kang ,  Cheng-Ting Wu

IPC: G06F13/28

CPC classification number: G06F13/28

Abstract: In an electronic system, a DMA circuit is supplied with a device selection signal that indicates a processor is accessing or going to access a memory. If the DMA circuit finds that the processor is not accessing or not going to access the memory, the DMA circuit starts its DMA operations. Once the DMA circuit finds that the processor is going to access the memory, the DMA circuit stops its DMA operation and return the use of the memory to the processor.

Abstract translation: 在电子系统中，向DMA电路提供指示处理器正在访问或将访问存储器的设备选择信号。 如果DMA电路发现处理器没有访问或不访问存储器，DMA电路将启动其DMA操作。 一旦DMA电路发现处理器要访问存储器，DMA电路停止其DMA操作，并将存储器的使用返回给处理器。