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Two codes programmed into the flash memory

Hi everyone,

I would like to ask you, if there is approach to download two different codes into different banks of the main memory? The first code will be the firmware being executed by the uC and the second one is to be downloaded into the target device flash. So the controller in which both codes reside in, acts as replicator. The problem is how to download (using FET debugger tool) the second code, without first erasing the firmware of the replicator. The second code will be located at bank that is not occupied by the application program of the replicator. Excuse my bad English, I hope you get the idea!

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