公开(公告)号：US11860804B2

公开(公告)日：2024-01-02

申请号：US17364924

申请日：2021-07-01

Applicant: REALTEK SEMICONDUCTOR CORPORATION

Inventor： Chen-Tung Lin ,  Yue-Feng Chen

IPC: G06F13/30

CPC classification number: G06F13/30 ,  G06F2211/002 ,  G06F2213/28

Abstract: A direct memory access (DMA) controller, an electronic device that uses the DMA controller, and a method of operating the DMA controller are provided. The DMA controller is configured to access a memory that contains a privilege area and a normal area. The method of operating the DMA controller includes the following steps: searching for a DMA channel that is in an idle state in the DMA controller; setting a register value of a mode register of the DMA channel such that the DMA channel operates in a privilege mode; setting a memory address register and a byte count register of the DMA channel; and controlling the DMA channel to transfer data based on the memory address register and the byte count register.

公开(公告)号：US11829310B2

公开(公告)日：2023-11-28

申请号：US17488637

申请日：2021-09-29

Applicant: REALTEK SEMICONDUCTOR CORPORATION

Inventor： Chen-Tung Lin ,  Yue-Feng Chen

IPC: G06F13/28 ,  G06F13/42 ,  G06F9/30

CPC classification number: G06F13/28 ,  G06F9/30101 ,  G06F13/4282

Abstract: A direct memory access (DMA) controller, an electronic device that uses the DMA controller, and a method of operating the DMA controller are provided. The DMA controller is configured to access a memory that contains a secure area and a non-secure area. The method of operating the DMA controller includes the following steps: searching for a DMA channel that is in an idle state in the DMA controller; setting a register value of a mode register of the DMA channel such that the DMA channel operates in a secure mode; setting a memory address register and a byte count register of the DMA channel; and controlling the DMA channel to transfer data based on the memory address register and the byte count register.