Bus Interconnect Evolution in embedded computing

Transcription

1 Bus Interconnect Evolution in embedded computing Fortronic Industrial Torino Torino 8 Marzo Embedded Computing Embedded Computing Applications Form Factors Trends, drivers Serial Communication Compact Serial Conclusion 2 1

2 Embedded Computing Embedded Computer: Integrated into the physical structure of products and machines Usually without screen, keyboard Designed to perform a dedicated function and both HW and SW are specific for it. Single boards / multiple boards / rack mount systems From very small (SFF) up to large (6U) systems integration of hardware and software 3 Embedded Computing Retail Transportation Defense Anywhere, everywhere Medical Automotive Industrial Consumer Instrumentation 4 2

3 Today s Focus Which Form Factor? Cost Connector strategy Power requirements Upgradability Size Form Factor CPU Chipset availability Projected volumes Thermal management 5 Embedded Computing Form Factors Form Factor Standard Committee Bus Architecture Interconnect Form Factor Size VME VITA Parallel DIN U, 6U VXS VITA Hybrid DIN + MultiGig RT 3U, 6U VPX VITA Serial MultiGig, Fortis ZD 3U, 6U Compact 2.0 PICMG Parallel Hard Metric 3U, 6U Compact 2.3 IO PIGMG Hybrid Hard Metric + UHM 3U, 6U Compact S.0 PICMG Serial Hard Metric 3U, 6U microtca PIGMG Serial EdgeCard 2U Advanced TCA PICMG Serial Edge Card 8U Express -SIG Serial Edge Card SFF PC 104 PC104 Serial PC104 Conn SFF COM Express PIGMG Serial COM Express SFF ITX PIGMG Serial Various SFF 6 3

4 Leading Bus Standards IEEE and IEC define the mechanical dimensions Bus standards define the electrical specification Two organizations defining bus standards: A consortium of consortium of companies collaboratively develop open specifications for computing applications. 7 VITA & PICMG Evolution Telecom, Transportation Industrial, Instrumentation, Medical Parallel Bus Defense c 1995 Parallel Bus VME Parallel Bus VME64 VITA31 ce 2005 Parallel Bus Serial Add On Parallel Bus Serial Add On 1994 VXS Parallel /Serial Bus c PlusIO 2009 Serial Bus 2006 Serial Bus VPX Serial Bus c serial Timeline 9 4

5 The systems world need more Bandwidth Parallel BUS Parallel Transmission it s tired 1. More space in the board 2. More difficult to control the propagation time 3. More critical the crosstalk 4. Each bit need a dedicated termination system 5... The systems world is moving to SERIAL Serial communication is accelerating performance Serial Transmission 1. Less number of transmission line.save space on the board. 2. Less Crosstalk, 3. Skew not an issue anymore, 4. Tipically 1. Point to point, Differential (LVDS), 2. Up to 12,5 GB/s per channel Serial BUS 10 Compact Strong established standard in Telecom; Industrial; Transportation; Medical and Instrumentation Evolution to meet market needs ~ 600Gb/s 1Gb/s 32-bit 2Gb/s 64-bit 2..4Gb/s 1..3Gb/s 32-bit 64-bit 32-bit Gb/s 4x1 -E up to Gen2 32-bit 6x4 -E up to Gen3 2x8 -E up to Gen3 Compact PCMG2.0 (1999) Compact PCMG2.0 PICMG2.16 (2001) Compact Plus I/O PCMG2.30 (2009) Compact Serial PICMG c-s (2011) 2xGE Up to 4xGE Up to 10xGE parallel hybrid serial Latest addition: Compact Serial 11 5

6 Compact Serial With Compact Serial (PICMG C-S.0) the Compact architecture moves to highspeed serial interconnects Enables concurrent support of Express (up to 8 Gb/s), SATA/SAS (up to 6 Gb/s), USB 2.0/3.0 and 10 Gb Ethernet Replaces 2mm hard-metric Compact connectors with higherspeed, higher-density AirMax VS connectors capable of supporting differential signaling at > 10 Gb/s even more. Defines a modular computer system consisting of a passive backplane, a system slot, and peripheral boards : Keeps the proven 19 mechanics of the IEC 1101; 3U and 6U boards are supported The mechanical design is fully backward compatible with Compact and will interoperate with existing systems. Allows implementation of hybrid systems to ease the migration from Compact to Compact Serial 3U Example The future of embedded computer systems 12 c Serial Communication Board 1 System Slot (CPU) Standard 12V Power Requirement Up to 8 Peripheral Slots Each CPU board can be plugged into every peripheral slot Each peripheral slot is identical Supports: 8 e 8 SATA/SAS 8 USB 2.0/3.0 8 Gb Ethernet + system signals Switch ONLY the switch slot needs all connectors Receptacles on the backpanel Headers on the plug-in boards Interfaces: 1 e 1 SATA/SAS 1 USB 2.0/3.0 1 Gb Ethernet 13 6

7 Connector for Compact Serial AirmaxVS Frequency 12 Gb/s + IEEE 1101 compliant Hard Metric Shieldless Optimized for differential signals Providing excellent robustness Impedance control AirmaxVS makes c Serial an easy to implement architecture 14 Summary Compact Serial: the future of embedded computer systems Improved performance and flexibility Simple star architecture for Express, USB, SATA and GbE 3U & 6U cards, 19 racks, hot-swap support Low cost, scalable architecture Conductive cooling, excellent robustness AirmaxVS connectors from FCI make Compact an easy to implement architecture Lower cost compared to other serial bus standards FCI technologies for shield-less design with no metallic plates and closely coupled differential pairs deliver low loss and crosstalk. Opposed dual-beam receptacle contact structure provides high reliability Open pin field design provides flexibility to use pins for differential or single-ended signals, ground or power. See for general information and for connector information 15 7

8 Appendix Compact Serial vs. VPX Compact Serial Standardized pin-out High signal density No switch needed Single 12V, COTS power supply VPX Interoperation problem Lower signal density Switches/bridges necessary Expensive power supply 18 8

9 Compact Serial vs. MicroTCA Compact Serial Simple system architecture, switch not needed Efficient thermal management Well-proven, widely-used mechanical design Hybrid system possible MicroTCA Complex architecture Challenging thermal design New mechanical design No backward compatibility 19 GRAZIE 20 9