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A modular development board for the FemtoStar Helion redundant compute unit
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README.md

Helion Modular Development Platform

Board layout of HMDP board

Helion is a single unit of the FemtoStar Helium triple-modular-redundant onboard computer. Helion Modular Development Platform (HMDP) is a modular development platform for the Helion, designed to be connected via a card edge to an external backplane, wherein three HMDPs can operate as a complete Helium system.

Note that this revision of HMDP may differ from the final Helium system in terms of timing, in particular due to the rather simple, non-length-matched breakout to the card edge - this would be relevant at some of the I/O speeds attainable with the ECP5 but is not expected to present a substantial problem at the speeds intended for Helium testing.

All designs are KiCAD, of course :).

For more info on Helium, see: https://git.femtostar.com/femtodev/5th-annual-pocketqube-workshop-slides/-/blob/master/HeliumPresentation.pdf