Question: How you would you recover if power was lost while programming the F206 Flash via the UART during a field upgrade.

Answer: Two possible options:

1. Of course the first option is to use JTAG/XDS510/XDS510pp like tool to recover the flash with new bootcode and start over. This is the will be the safest method.

2. Other option is to have a copy flash boot code in flash 1 array as well. At boot time the system can boot from external ROM/ASIC and branch to flash 1 array boot code to get control of the CPU.