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Please use this identifier to cite or link to this item: http://hdl.handle.net/2014/40550

Title: Fault tolerant state machines
Authors: Burke, Gary R.
Taft, Stephanie
Keywords: state machine
encoding
fault tolerance
resources
Issue Date: 8-Sep-2004
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004.
Citation: Military and Aerospace Programmable Logic Device (MAPLD), Washington, D. C., September 8, 2004.
Abstract: State machines are commonly used to control sequential logic in FPGAs and ASKS. An errant state machine can cause considerable damage to the device it is controlling. For example in space applications, the FPGA might be controlling Pyros, which when fired at the wrong time will cause a mission failure. Even a well designed state machine can be subject to random errors us a result of SEUs from the radiation environment in space. There are various ways to encode the states of a state machine, and the type of encoding makes a large difference in the susceptibility of the state machine to radiation. In this paper we compare 4 methods of state machine encoding and find which method gives the best fault tolerance, as well as determining the resources needed for each method.
URI: http://hdl.handle.net/2014/40550
Appears in Collections:JPL TRS 1992+

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