1.3.6. Using Remote System Upgrade
You can download a new configuration image from a remote location, store it in the flash memory device, and direct the PFL IP core to trigger an FPGA reconfiguration to load the new configuration image. You must store each configuration image as a new page in the flash memory device. The PFL IP core supports a maximum of eight pages.
When using remote system upgrade, the configuration images are classified as a factory image or as application images. A factory image is a user-defined fall-back or safe configuration that performs system recovery when unintended errors occur during or after application image configuration. The factory image is written to the flash memory device only once by the system manufacturer and you must not modify or overwrite the factory image. Application images implement user-defined functionality in the target FPGA and you can remotely update in the system.