sentences:  All three processors have the FRM (Functional Redundancy Monitoring) synchronous multiple modular lockstep mechanism, which enables fault-tolerant computer systems.It requires multiple devices of the same model, one of which then operates in "master mode", while the other devices listen to the master device, in "checker mode".If two or more devices simultaneously output different results via their "fault output" pins, a majority-voting decision can be taken by external circuits.