i.MX31 PDK Setting Buttons and Jumpers

Document created by jesseg Employee on Aug 22, 2012Last modified by Jodi Paul on May 17, 2013
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i.MX31 - 3 Stack

There are two boot modes for IMX31PDK. In Internal Boot mode, the processor will execute an address from internal memory, and in External Boot mode the processor will execute an address from a external memory properly configured. This modes can be configured setting the values of dip switch SW5-SW10 shown in image below.

 

 

400px-Imx31-3stack.png

 

Debug board. Top view.

External Boot from Flash

In this mode, the processor will execute an address into a external flash (NAND).

If there is a bootloader saved in the right place in flash, it will be executed and the system will start. If there are a kernel image and a root file system saved configured, the operational system will start.


External_boot.png


The values for the i.MX31 PDK dip switches programming the boot sequence are show in table below.

SW5 SW6 SW7SW8SW9SW10
Internal Boot (programming flash)000000
External Boot from Flash010000

Internal Boot

The Internal Boot mode enables ATK to communicate with processor and perform the writing of images into flash (bootloader image, kernel image and root file system image).

Internal_boot.png


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