On Mon, 27 Jul 2009 22:40:01 +0100 Matt Fleming <matt@xxxxxxxxxxxxxxxxx> wrote: > On Mon, Jul 27, 2009 at 01:09:47PM +0100, David Vrabel wrote: > > Philip Langdale wrote: > > > > > > Both the (Simplified) SD and SDIO specifications do not formally > > > define the 'low voltage' range in the way the MMC spec does. ie: > > > You won't find anything in the SD specs that even tell you what > > > the range is - it just says that it exists. > > > > Standard SD/SDIO cards only support 2.7-3.6V. > > > > 1.8V operation is added in SD physical spec 3.00 and is part of any > > of the UHS-1 modes (SDR12-SDR104 and DDR50). It has a different > > timings and requires a different (3.00 compliant) host controller. > > Is the 3.00 spec publicly available? > Indeed! If the 1.8V operations have conformance requirements beyond those of MMCplus/MMCmobile, then we can't just remove the current test as proposed. I've been checking the sdcard.org site periodically for new specs and haven't seen anything yet. --phil -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
