Research and Design of a SD Bus Implement Based on GPIO
With the rapid growth of consumer electronics technology,the SD card is spread used in variety devices.In the designs of consumer product,considering of SD card support in storage interface is very popular.But there are so many main chips that have no SD hardware controller,so the GPIO simulation is a important implement.This thesis discusses the SD bus's feature and provides a detailed algorithm for the implement.Finally,the experiment results and optimization are analyzed.