To overcome this deficit, a novel on-board-computer architecture is described in this thesis. However, due to their low reliability and brief lifetime, they are usually not considered suitable for life- and safety-critical services, complex multi-phased solar-system-exploration missions, and missions with a longer duration.Ĭommercial electronics are key to satellite miniaturization, but also responsible for their low reliability: Until 2019, there existed no reliable or fault-tolerant computer architectures suitable for very small satellites. Especially CubeSats can be launched and manufactured rapidly at low cost from commercial components, even in academic environments. Miniaturized satellites enable a variety space missions which were in the past infeasible, impractical or uneconomical with traditionally-designed heavier spacecraft. It is shown that the distributed memory architecture has a smaller resource cost (as small as 25% of the ALMs and 20% of the registers) compared to the global memory architectures.
#Multiclock domain synchronization software#
We implement the architectures using Intel FPGAs Quartus Prime software targeting an Intel FPGA Cyclone V. The design is compared to that of a 'global' settings register architecture. This paper presents an architecture for implementing and programming these settings registers in a distributed method across an FPGA and how the presented architecture works in both clock-domain crossing and dynamic partial re-configuration applications. Implementing these settings registers requires a level of care otherwise the resulting implementation can result in a number of large fan-out nets that consume valuable resources complicating the placement of timing critical pathways.
#Multiclock domain synchronization series#
Modern FPGA systems and ASICs contain an area of memory used to set the operation of the device from a series of commands set by a host. Memory requires large physical area, access times limit overall system performance and connectivity can result in large fan-out. The use and location of memory in integrated circuits plays a key factor in their performance.
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