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Published byMagnus Archibald Barnett Modified over 9 years ago
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Sheng Peng March, 2010 1
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We are talking about CPU board, not CPU No embedded low-power low-performance mobile CPU is needed We don’t seem to have space/heat issue No need to use embedded CPU core within FPGA Limited capability Roadmap is not clear 64-bit Industrial trend for server/backbone No need at frontend Local knowledge has to be counted PPC.vs. x86 PPC has nice architecture and AltiVec™ Consider popularity, software, bus architecture and performance, I prefer x86. 2
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VME bus is getting old and the bandwidth is too low 2eSST is not widely implemented on slave boards VXS/VPX is not “VME” anymore Expensive and not efficiently used CompactPCI is better than VME Higher bandwidth Cheaper Moving to serial link, i.e. PICMG 2.16 High speed serial point-to-point link is clearly the future. ATCA/ μ TCA (with RTM extension) look great Great bandwidth Not too expensive (comparable to VME) High availability and fully manageable With PMC carrier and IP carrier if needed 3
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Only standard bus architecture should be considered Industry Pack is little brother of “VME” and is slow and old as well. PMC/PMC-X/XMC are highly preferable over Industry Pack More and more vendors and COTS available Much higher bandwidth leads to more applications/choices AMC (with RTM extension) look great Choice of COTS AMC IO modules is still limited But with PMC carrier and IP carrier if needed COM Express A PICMG standard Snap-on solution PCIe and multi GigaE available 4
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Well accepted industrial leader shall be selected Real Time OS is definitely needed in certain application vxWorks Real Time Linux should be evaluated (Monta Vista, RTLinux, BlueCat) Regular OS Linux (RHEL is good from the experience so far) 64-bit? Debatable? Consider the compatibility with ATCA/ μ TCA and unified development environment, Linux/Real Time Linux solution is attractive 6
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Very attractive technology: Reduce hardware cost Improve the availability Easier management Many solutions include VMWare, MS Hyper-V and RHEL Xen VMWare is the leading solution Hard Real Time IOC with Virtualization VMWare or WindRiver HyperVisor Help to isolate subsystem without extra cost to CPU/Crate Need evaluation (performance concern) 7
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A lot of types of Fieldbus available Most of time it is dominated by device The preference is Ethernet Cheap Easy to configure Well accepted, popular Real Time performance is achievable to certain level IEEE 1588 LXI could be worth a try 8
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Role of PLC Reliable interlock (Vacuum) Safety System ??? AB or Siemens? Both expensive Should we consolidate to one supplier? Cheaper solution Low end of AB? DirectLogic from AutomationDirect? 9
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