【精品】SoC设计方法与实现第二章 设计流程精品ppt课件.ppt

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1、SoC设计方法与实现第二章 设计流程OutlinesHardware/software(HW/SW)co-design flowStandard cell based design flowDuality of Software and HardwareThe hardware and software in an embedded system work together to solve a problem How to partition is usually dictated by speed and costnDedicated hardware is fast,inflexible

2、 and expensivenReconfigurable hardware is fast,flexible and more expensivenSoftware is slower,more flexible and cheaperHW/SW Pro and ConHardware solution:PROnCan be factors of 10X,100X or greater speed increasenRequires less processor complexity,so overall system is simplernLess software design time

3、 requirednUnless hardware bug is fatal,workarounds might be doable in softwareHardware solution:CONnLarge NRE charges nPotentially long development cycle nLittle or no margin for errornOnly 50%of ASIC ICs work the first timenIP Royalty charges nHardware design tools can be very costly HW/SW Pro and

4、ConSoftware solution:PROnNo additional impact on materials costs,power requirements,circuit complexitynBugs are easily dealt with,even in the field!nSoftware design tools are relatively inexpensivenNot sensitive to sales volumesSoftware solutions:CONnRelative performance versus hardware is generally

5、 far inferiornAdditional algorithmic requirements forces more processing powernBigger,faster,processorsnMore memorynBigger power supplynRTOS may be necessary(royalties)nMore uncertainty in software development scheduleSoC Design FlowHardware/software co-design flowDetailed hardware design flowStandard Cell Based ASIC Design Flow Traditional ASIC Design Flow cont.Detailed Design FlowDetailed Design Flow cont.Detailed Design Flow cont.SoC设计方法与实现设计方法与实现郭炜郭炜 郭筝郭筝 谢憬谢憬Thank you