Atmel AT91SAM926x boards have several different types of external non-volatile memories. The bootloader in the device can detect an application image in external memory, and if such an image is found, copy the image to SDRAM at boot-time.
The PDF file How to set up the options.pdf explains how to set up the options in IAR Embedded Workbench for ARM in order to download the image of the application to external dataflash.
The PDF file also explains how to connect and debug when that image is copied to SDRAM at boot-time.
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