Shematic: http://mightymicrocontroller.com/Mighty-schematic-full.png Hey guys, For the last week I've been pulling my hair out over this issue with my SD card. It works with my firmware if I burn it directly, but with the code in my bootloader which reads the firmware from the SD card, the SD car…

SD card not working unless I enable pullup on MISO. Is this okay?

dc42 February 25, 2013, 7:23pm 2

What level shifting circuitry do you have connected between the 5V microcontroller and the 3.3V SD card?

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