A system having an arbitrated interface bus and a method of operating the same are provided. The system may include, but is not limited to, one or more registers configured to store data, a plurality of external interfaces configured to receive data access requests for the register(s), an arbitrator communicatively coupled to each of the plurality of external interfaces, and an interface bus communicatively coupled between the arbitrator and the register(s), wherein the arbitrator is configured to arbitrate control of the interface bus between the plurality of external interfaces.