The protocol used on SDHC is different not backwards compatible.
Quote from: smeezekitty on Jan 15, 2013, 02:57 amThe protocol used on SDHC is different not backwards compatible.Ehh... in all our cases, we're using the SPI fallback protocol anyway. That is a non-optional part of the SD spec. The only thing that differs is the initialization sequence and how blocks are addressed. It would be foolish to implement a design that didn't interrogate the card to ensure the right method was used, so I don't see backwards compatibility suffering any time soon.If I'm wrong, I'd love to hear the opposing viewpoint.