C8051F340读写SD卡的程序，是官方的例子，有详细注释，很好，可以把340作为读卡器使用。推荐下载。这是例子1，还有例子2-C8051F340 procedures to read and write SD card is the official example of detailed notes, very good, can use 340 as a card reader. Recommended download. This is one example, there are e