TS-4900 MicroSD Card Interface
From embeddedTS Manuals
The i.MX6 SDHCI driver supports MicroSD (0-2GB), MicroSDHC (4-32GB), and MicroSDXC(64GB-2TB). The cards available on our website on average support up to 16MB/s read, and 22MB/s write using this interface. The linux driver provides access to this socket at /dev/mmcblk1 as a standard Linux block device. See chapter 67 of the IMX6 reference manual for more information on the controller.