DMA Unit Parallel Data Transfer in Storage Devices
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Solution Overview
Problem
Current data storage devices using nonvolatile memory devices face limitations in data processing speed due to the lack of efficient data transmission mechanisms between the nonvolatile memory device and the host device.
Innovation Solution
Incorporating a direct memory access (DMA) unit within the data storage device to manage data transmission between the nonvolatile memory device and the host device through a buffer memory, allowing parallel transmission of data, thereby enhancing data processing speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission is performed sequentially from nonvolatile memory device to buffer memory and then to host device, then device complexity is reduced, but data processing speed deteriorates
Solution Approach 1:
The data transmission path is segmented into two parallel channels: one for transferring data from nonvolatile memory device to buffer memory, and another for transferring data from buffer memory to host device. This segmentation allows simultaneous operation of both transmission paths, resolving the contradiction between improved data processing speed and device complexity.
Solution Approach 2:
Data is preliminarily transferred to the buffer memory from the nonvolatile memory device before being transferred to the host device. This preliminary action enables the buffer memory to serve as an intermediate staging area, allowing parallel transmission operations and improving overall data processing speed without significantly increasing device complexity.
2Productivity
If parallel data transmission is implemented through DMA unit, then data processing speed is improved, but device complexity increases
Solution Approach 1:
The buffer memory serves as an intermediary component between the nonvolatile memory device and the host device, enabling parallel data transmission. The DMA unit utilizes this intermediary to perform simultaneous data transfers, improving data processing speed while keeping the increase in device complexity manageable through the use of a standard buffer memory component.
Data Source
AI summary
A data storage device includes a nonvolatile memory device; a buffer memory for storing temporarily data to be transmitted from the nonvolatile memory device to a host device or data to be transmitted from the host device to the nonvolatile memory device; a memory control unit for performing a control operation for controlling the nonvolatile memory device; and a direct memory access (DMA) unit for performing a data transmission operation associated with the buffer memory, according to control of the memory control unit, wherein the DMA block transmits a first data from the nonvolatile memory device to the buffer memory, and wherein the DMA unit transmits a second data from the nonvolatile memory device to the buffer memory, while the first data stored in the buffer memory is transmitted from the buffer memory to the host device.