Polarity of SD/MMC DAT0 and CMD pins

Started by ruasoh, Jan 15, 2007, 06:44

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Does anyone know what the polarity is of the pin 2 (CMD) and pin 7 (DAT0) on an SD/MMC card?  Or does it matter?  I want to connect a USB data+ and Data- to an SD card, but I'm not sure which pins to connect.