SD卡字符图片
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//SD CARD // _________________ // / 1 2 3 4 5 6 78 | <- view of MMC/SD card looking at contacts // / 9 | Pins 8 and 9 are present only on SD cards // | MMC/SD Card | // | | // X X X X X X X X X X // 1 - CS (chip select) - wire to any available I/O pin(*) // 2 - DIN (data in, card<-host) - wire to SPI MOSI pin // 3 - VSS (ground) - wire to ground // 4 - VDD (power, 3.3V only?) - wire to power (MIGHT BE 3.3V ONLY!) // 5 - SCLK (data clock) - wire to SPI SCK pin // 6 - VSS (ground) - wire to ground // 7 - DOUT (data out, card->host) - wire to SPI MISO pin
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