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Comprehensive Low Power Design Analysis and Optimization An RTL to GDSII Approach Aveek Sarkar and Ronen Stilkol Apache Design Solutions
Power: The Metric For Chip Success ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Power dissipated = voltage X current Current Drawn
Trends in Current Draw and Power Dissipation ,[object Object],[object Object],[object Object],[object Object]
Current and Voltage as  Design Targets ,[object Object],[object Object],1 1 Predict power accurately “early” 2 Predict power reduction possible 2 3 Identify achievable design changes 3 Power Number of RTL edits
Power in the RTL  GDS II  Flow Target power reduction early in the design flow Ensure design verification to predict voltage drop noise from low power techniques Power reduction  Usage Curve Power Integrity  Usage Curve Physical Implementation & Signoff RTL Design  & reduction Floor-planning & Synthesis Chip-Package-System Convergence
Techniques for Power Reduction An Analysis Driven Approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operational Power Reduction   Clock Tree Optimization RTL: Add and Improve Clock Enables  Non-enabled Enabled sel sel_1d 1 R2 D RTL reductions make clock gating more effective EN CLK CG GCLK D EN CLK D Synthesis: Clock Gating RTL Gates
Operational Power Reduction   Datapath Optimization
Standby Power Reduction   Power Gating ,[object Object],[object Object],Power Gating Options Header Switches Footer Switches Block Vdd Vss CTL Block Vss Vdd CTL Dual Switches cntl1 cntl2 Ext VSS Int VSS Ext VDD Int VDD
[object Object],[object Object],Power gating Clock gating Clock mode transitions generate transient event causing Ldi/dt noise  Impact of Low Power Design  Techniques on Power Integrity Constant activity Mode Clock gating mode
Impact of Design and Process  Changes on Silicon Integrity
Low Power Design Verification Challenges ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Change in ESC/ESR for a decap cell Normalized against 130nm
Power Integrity Analysis for  Low Power Designs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Case Studies Bump Placement and Package Issues Highlighted ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],L di / dt ~ high DvD High drop area
Chip Package System Convergence An RTL to GDSII Focus 06/22/10 ,  RTL to GDS CPS Convergence RTL Design  & reduction RTL Power Reduction RTL Power Analysis Floor-planning & Synthesis PG, IO Planning Early CPM Package/PCB planning Physical Implementation & Signoff IP Validation SoC Analysis Timing Impact CPS sign-off + cost down
[object Object],[object Object],[object Object],[object Object],[object Object],Selected References

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Apache track d updated

  • 1. Comprehensive Low Power Design Analysis and Optimization An RTL to GDSII Approach Aveek Sarkar and Ronen Stilkol Apache Design Solutions
  • 2.
  • 3.
  • 4.
  • 5. Power in the RTL  GDS II Flow Target power reduction early in the design flow Ensure design verification to predict voltage drop noise from low power techniques Power reduction Usage Curve Power Integrity Usage Curve Physical Implementation & Signoff RTL Design & reduction Floor-planning & Synthesis Chip-Package-System Convergence
  • 6.
  • 7. Operational Power Reduction Clock Tree Optimization RTL: Add and Improve Clock Enables Non-enabled Enabled sel sel_1d 1 R2 D RTL reductions make clock gating more effective EN CLK CG GCLK D EN CLK D Synthesis: Clock Gating RTL Gates
  • 8. Operational Power Reduction Datapath Optimization
  • 9.
  • 10.
  • 11. Impact of Design and Process Changes on Silicon Integrity
  • 12.
  • 13.
  • 14.
  • 15. Chip Package System Convergence An RTL to GDSII Focus 06/22/10 , RTL to GDS CPS Convergence RTL Design & reduction RTL Power Reduction RTL Power Analysis Floor-planning & Synthesis PG, IO Planning Early CPM Package/PCB planning Physical Implementation & Signoff IP Validation SoC Analysis Timing Impact CPS sign-off + cost down
  • 16.