Aurora 64B/66B Bus Functional Model User Guide (UG508) - 1.0 English - Aurora 64B/66B bus functional model (ABFM 64B/66B) models the Aurora 64B/66B protocol as defined by Aurora 64B/66B Protocol Specification v1.1 (SP011). It is used for verifying an Aurora 64B/66B protocol implementation design which is referred to as device under test (DUT).