• permanent faults
• On-Line testing
• partial dynamic reconfiguration
• FPGA

FPGAs become ever more popular thanks to their features, such as reconfigurability and short time to market. When FPGAs operates in harsh environment, like in space, soft faults can occur (SEU) due to radiation, as well as permanent faults (TID, Aging). To the best of my knowledge, testing of logic resources has already been widely considered in literature, on the other hand this work aims to detect permanent faults which can affect the interconnection infrastructure. In modern FPGAs the routing resources represents up to 80% of the whole chip area. Few works consider permanent faults and none of them deals with on-line testing of permanent faults with using independent test circuits. In this work a first approach is presented, where different circuits have been developed and tested on a DB-V4 of the RAPTOR system.