针对使用SD卡实现高速大容量数据的存储问题,设计了一种基于FPGA的SD卡控制器。目前使用微处理器驱动SD卡时主要使用SPI模式,但SPI模式存储速度较低,若要实现高速大容量数据的存储,需要开发一种基于SD模式的SD卡控制器。本文选取FPGA进行控制器的设计,将控制器主要分为时钟分频模块、命令响应模块、数据传输模块以及CRC校验模块,并使用ZYNQ7010芯片的FPGA部分进行各个模块的仿真验证,充分利用FPGA的可扩展性及SD模式的存储速度优势,为使用SD卡实现高速大容量数据存储提供支持。
Abstract
Aiming at the problem of using SD card to realize high speed and large capacity data storage,a SD card controller based on FPGA is designed.At present,SPI mode is mainly used when microprocessor-driven SD card is used,but the storage speed of SPI mode is low.In order to realize high-speed and large-capacity data storage,it is necessary to develop an SD card controller based on SD mode.In this design,FPGA is selected to design the controller,which is mainly divided into clock frequency division module,command response module,data transmission module and CRC check module.The FPGA part of ZYNQ7010 chip is used for simulation verification of each module,making full use of the expansibility of FPGA and SD mode storage speed advantage.It can provide support for high-speed and large-capacity data storage using SD cards.
关键词
SD模式 /
FPGA /
SD卡 /
ZYNQ7010
Key words
SD mode /
FPGA /
SD card /
ZYNQ7010
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