On Thu, Sep 1, 2011 at 7:56 AM, IVP wrote: > No doubt. I'm just impressed that this particular Class 4 (> =3D 4MB/s) > card can sustain > 7MB/s writes, which is better than minimum spec > for a Class 6. JFTHOI I'd give 4-bit a go when I'm happy with SPI > > Joe IIRC 4-bit mode isn't an open standard. I don't think it's reasonable to achieve it without specialized hardware even if you can get the spec. This would probably mean you need an FPGA, or to use a microcontroller with an SD card port. I've never seen one, myself. --=20 Martin K. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .