Globally Updated Mesochronous Design Style (GUM-design-style)

摘要

In large-scale and high-speed digital systems, globalrnsynchronization has frequently been used to protectrnclocked I/O from data failure do to metastability.rnSynchronous design style is widely used, easy to grasprnand to implement, also well supported by logic synthesisrntools. There are many drawbacks with globalrnsynchronization. Most important is the relationshiprnbetween physical size and maximum clock frequency,rnwhich will approach its limit as clock frequency andrnsystem size increase simultaneously. The purpose of thisrnproposed Globally Updated Mesochronous design stylern(GUM-design-style) is to overcome those by identifyingrnand allowing all single and bidirectional high-speedrnsignal links needed, still retaining the simplicityrnuncomplicated implementation and tool support. In thisrnpaper GUM-design-style is described, analysed andrndemonstrated. Experimental results from a large-scalernhigh-speed system using three 0.8 μm BiCMOS chips arerngiven. GUM-design-style is scaleable and suitable forrnfuture System on Chip (SoC) both on and between chips.