On Sun, Nov 23, 2014 at 8:23 PM, Robert Nelson <[email protected]> wrote: > On Sun, Nov 23, 2014 at 8:13 PM, liyaoshi <[email protected]> wrote: >> >> seems Ti update am335x mmc ip from dm814x >> >> http://www.ti.com/lit/ug/sprugz8e/sprugz8e.pdf >> page 2260 >> >> while from >> >> http://www.ti.com/lit/ug/spruh73k/spruh73k.pdf >> page 4104 >> >> • Support for SDA 3.0 Part A2 programming model >> >> This mean am335x can support sdxc card , maybe just lack of 200M clock and >> ddr mode > > A search on that turned up: > > https://www.sdcard.org/downloads/pls/simplified_specs/archive/partA2_300.pdf > > https://www.sdcard.org/downloads/pls/simplified_specs/
>From the am335x errata sheet: MMC0, MMC1, MMC2 Interfaces – Only Standard (STD) and High Speed (HS) modes are supported. SDR12, SDR25, SDR50 modes as defined in SD3.0 specification are not supported. So it's complaint to SD3.0 except for the transfer speeds. I guess if your TI and you have that issue, it's just safer to advertise it as "SD/SDHC" only. Instead of having users complain about it being "SDXC" and piss ass slow.. ;) Regards, -- Robert Nelson http://www.rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
