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Talks and Poster Presentations (with Proceedings-Entry):

M. Ferringer:
"Investigating Self-Timed Circuits for the Time-Triggered Protocol";
Talk: 5th International Workshop on Reconfigurable Communication Centric System-on-Chips, Workshop Proceedings (ReCoSoC), Karlsruhe, Germany; 2010-05-17 - 2010-05-19; in: "Proceedings of the 5th International Workshop on Reconfigurable Communication-centric Systems on Chip 2010", KIT Scientific Publishing - DFG, (2010), ISBN: 9783866445154; 101 - 108.



English abstract:
While asynchronous logic has many potential advantages compared to traditional synchronous designs, one of the major drawbacks is its unpredictability with respect to temporal behavior. Without having a high-precision oscillator, a self-timed circuitīs execution speed is heavily dependent on temperature and supply voltage. Small fluctuations of these parameters already result in noticeable changes of the designīs throughput and performance. This indeterminism or jitter makes the use of asynchronous logic hardly feasible for real-time applications. Based on our previous work we investigate the temporal characteristics of self-timed circuits regarding their usage in the Time-Triggered Protocol (TTP). We propose a self-adapting circuit which shall derive a suitable notion of time for both bit transmission and protocol execution. We further introduce and analyze our jitter compensation concept, which is a three-fold mechanism to keep the asynchronous circuitīs notion of time tightly synchronized to the remaining communication participants. To demonstrate the robustness of our solution, we will perform temperature and voltage tests, and investigate their impact on jitter and frequency stability.


Related Projects:
Project Head Andreas Steininger:
Asynchrone Logik in Echtzeitsystemen