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6/25/2016
ASIC - System on Chip- VLSI D esign: Power Planning
ASIC-System on on Chip-VLSI Design
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There are two types of po wer planning and management. They are core cell power management and anagement and I/O cell po cell power wer management. management. In former one VDD and VSS power rings are formed around the core and macro. In addition to this straps and trunks are created for macros as per the power requirement. In the later one, power rings are formed for I/O
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cells and trunks are constructed between core power ring and power pads. Top to bottom approach is used for the power analysis of flatten design while bottom up approach is
What is the difference between FPGA and ASIC? Backend (Physical Design) Interview Questions and Answers Companywise ASIC/VLSI Interview Questions
suitable for macros. The power information can be obtained from the front end design. The synthesis tool reports static power information. Dynamic power can be calculated using Value Change Dump (VCD) or (VCD) or Switching Activity Interchange Format (SAIF) file (SAIF) file in conjunction with RTL description and test bench. Exhaustive test coverage is required for efficient calculation of peak power. This methodology is depicted in Figure (1).
WRI
For the hierarchical design budgeting has to be carried out in front end. Power is
Are you articles this. this. Yo Yo professi papers
Process-Voltage-Temperature (PVT) Variations and Static Timing Analysis Clock Gating
calculated from each block of the design. Astro works on flattened netlist. Hence here top Power Planning
to bottom approach can be used. JupiterXT can work on hierarchical designs. Hence
Synthesizable and NonSynthesizable Verilog constructs
bottom up approach for power analysis can be used with JupiterXT. IR drops are not
What is the difference between FPGA and CPLD?
found in floor planning stage. In placement stage rails are get connected with power rings, straps, trunks. Now IR drops comes into picture and improper design of power can
To
lead to large IR drops and core may not get sufficient power.
What is the difference between soft macro and hard macro? Embedded System for Automatic Washing Machine using Microchip PIC18F Series Microcontroller
READ ASIC Synt Veril Ver eril il ve ri ril
Figure (1) Power Planning methodology Below are the calculations for flattened design of the SAMM SAMM.. Only static power reported
ve ri ril ques ve ri ril Verifi
6/25/2016
ASIC-System on Chip-VLSI Design: Power Planning Anonymous March 26, 2008 at 1:38 AM
Ot he
I think that formulas for Current supply from each side of the block: should be
Ileft=Iright= { Iblock *[Hblock / (Wblock +Hblock)] }/2 Could you please recheck? Reply
Prop Prot Qual RTL Rese
Anonymous March 26, 2008 at 1:41 AM I think that formulas for Current supply from each side of the block: should be Itop=Ibottom= { Iblock *[Wblock / (Wblock +Hblock)] }/2
Rout SDC SNU SRA Sand
Ileft=Iright= { Iblock *[Hblock / (Wblock +Hblock)] }/2 Could you please recheck? Reply
Shor Stati Sub Leak Syst
Anonymous December 24, 2008 at 10:02 PM
Texa (TI)
what is Roe here
Train
Reply
VLSI VLSI VLSI
Anonymous April 11, 2009 at 3:54 PM
Volta
What is Roe & routing pitch and from where we get these values???
WLM
Reply
Was West
Replies Anonymous October 30, 2012 at 8:51 PM Hi, Roe is the sheet resistance of the metal layer used for the routing, that is,the resistivity rho divided by the thickness of the routing layer
Wire free proc jitter laten optic
Reply
opti proc skew
Anonymous June 24, 2009 at 3:04 PM
trans
how to draw PG mesh accurately?
trans
Reply
unce
ravikumar July 22, 2010 at 11:45 AM where we get core voltage? its get from .lib library or not Reply
Anonymous October 9, 2010 at 11:18 AM Can any one tell., steps to calculate powerplanning with formulaes in Vlsi chip design. Reply
pruthvi February 11, 2014 at 2:56 PM fro where we get maximum current density of metal value? Reply
6/25/2016
ASIC-System on Chip-VLSI Design: Power Planning
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M.Sc in Electronics;M.S in VLSI System Design;worked 3 years as design engineer in embedded system domain; experience of PIC and 8051 based microcontroller applications;working as VLSI physical design engineer; photography,travel and literature are my hobbies.
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