第二章设计流程.ppt

1、第二章,SoC设计流程,Outlines,Hardware/software (HW/SW) co-design flow Standard cell based design flow,Duality of Software and Hardware,The hardware and software in an embedded system work together to solve a problem How to partition is usually dictated by speed and cost Dedicated hardware is fast, inflexibl

2、e and expensive Reconfigurable hardware is fast, flexible and more expensive Software is slower, more flexible and cheaper,HW/SW Pro and Con,Hardware solution: PRO Can be factors of 10X, 100X or greater speed increase Requires less processor complexity, so overall system is simpler Less software des

3、ign time required Unless hardware bug is fatal, workarounds might be doable in software Hardware solution: CON Large NRE charges Potentially long development cycle Little or no margin for error Only 50% of ASIC ICs work the first time IP Royalty charges Hardware design tools can be very costly,HW/SW

4、 Pro and Con,Software solution: PRO No additional impact on materials costs, power requirements, circuit complexity Bugs are easily dealt with, even in the field! Software design tools are relatively inexpensive Not sensitive to sales volumes Software solutions: CON Relative performance versus hardw

5、are is generally far inferior Additional algorithmic requirements forces more processing power Bigger, faster, processors More memory Bigger power supply RTOS may be necessary (royalties) More uncertainty in software development schedule,HW/SW Co-Design: New Design Methodology,ESL design make co-des

6、ign easier HW/SW partitioning Co-specification, co-analysis, co-simulation, co-verification Interface synthesis Verification of complete system both HW/SW,ESL Co-design Flow,SoC Design Flow,Hardware/software co-design flow Detailed hardware design flow,Standard Cell Based ASIC Design Flow,Traditional ASIC Design F