Introduction - If you have any usage issues, please Google them yourself
51 Single-chip design report card reader SD_MMC This document presents the platform of the 51 way through the SPI read and write SD/MMC cards, including hardware and software needs, SD/MMC hardware connection, SPI interface software simulation, SD/MMC initial power , and write a single block, reading a single block, multi-block write, read multi-block, block erase, epistatic serial communication protocol, PC Host software descriptions.