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Designer 3.0 or 3.1 may be used to program the RH1280. Designer 3.0 had a patch to include the RH1280 0 and 300krad timer. This patch is automatically included in Designer 3.1. Note that the RH1280 die is identical to the A1280XL die, so a fuse file generated for an A1280XL die will also program the RH1280.
