View source for CM-FX6: U-Boot: Creating a bootable SD card

== Introduction ==
CM-FX6 system-on-module uses SPI flash as its main boot storage.
In addition to the on-board SPI flash, the CM-FX6 can also boot from an SD card.
This article describes the preparation and boot process using an SD card.

== SD card requirements ==
Prior to installing the CM-FX6 firmware on an SD card, make sure that:
* The SD card partitions do not start in the first 1MB of the SD card. Otherwise, the partitions may be overwritten by this procedure.
* The partitioning is not done using GPT. Otherwise, the GPT data above 1K (from start of SD card) will be overwritten by this procedure.

== Installing firmware on an SD card ==
The firmware can be installed on an SD card using a workstation with an SD card reader.
* Insert the SD card into the workstation card reader
* The SD card will be identified as {{filename|/dev/sdX}}, where X is the SD card drive letter.
* Run the following command:
<pre>
dd if=cm-fx6-firmware of=/dev/sdX bs=1K skip=1 seek=1 oflag=dsync
</pre>

== Booting from an SD card ==
* Plug the SD card into the SDIO3(BOOT) SD card socket of the SB-FX6
* Hold the BOOT SELECT (SW5) button while resetting/powering on the CM-FX6 evaluation system
* The CM-FX6 will boot from the SD card

== See also ==

* [[CM-FX6: U-Boot: Firmware Overview]]
* [[CM-FX6: U-Boot: Firmware Update]]

[[Category:U-Boot]]
[[Category:CM-FX6]]