On 5/18/2015 12:39 PM, Harrison Cooper wrote: > James...aren't camera's and cell phones, where the SD cards are targeted = use for, embedded devices? So the firmware is actually tested against thos= e more so than an OS. > Lost in the thread, I think, is that most people here have been using SD=20 cards in 1-bit SPI mode and not the native 4-bit SD/SPI mode. SD cards are notoriously randomly compliant in SPI mode, whereas in=20 SD/SPI mode they have to work or they would be considered dysfunctional=20 by users of cameras/phones. Thanks, Martin --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .