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sorry a power is always in watt (V * A). 1 joule is 3600 watt-hour. and the liberty file only reports A. and backend tools (synthesis, PnR) reports in Watt. - - - Updated - - - where did you see in Joule?
Hi All, How usage in different cost groups may help to meet timing in synthesis? Could you please provide examples? Thank you!
1-The liberty is not usable for digital simulation. The liberty is atiming/area/cap/trans/power information's for synthesis/PnR/STA tools. 2-The liberty format is describe here .
How to add power ports in RTL? Or you add power ports in manually instantiated leaf gates in RTL? I dont know if synthesis tool can add power ports in synthesized netlist which I have never tried. Well, if your BE flow accepts power ports in prelayout netlist, then everything is ok.
i have get this resulte after synthesis Cell Leakage power more than Total Dynamic power , is that normal Cell Internal power = 19.8773 nW (23%) Net Switching power = 65.3011 nW (77%) --------- Total Dynamic power = 85.1783 nW (100%) (...)
I would like to write script for Cadence RTL compiler synthesis, using saed32nm tech libraries, but there are a lot of standard cell library files(.db .lib), I choose one of them but failed to perform the synthesis, saying the libraries do not have usable basic gates. Is this because I choose wrong library path and lib files or other reasons? My co
Hi All, There are several approaches regarding mix-library (HVt and LVt)synthesis Approach#1: synthesize all your design with HVt lib and only then optimize critical paths with LVt cells Approach#2: give to the tool all your libraries and it will do its best to meet timing, area and power. What approach is best and why? Thank you!
Well, the .lib file will only give you an estimate of timing/power/leakage after synthesis. It will give you an estimate of area, but to get a complete picture you do need layouts of the standard cells and need to go through complete place and route. I believe that the Nangate 45nm was created using ASU PTM 45nm model files and NCSU OpenPDK layout,
Hello all, Discuss here the design challenges of clock tree synthesis. CTS quality checks: skew, minimum pulse width, duty cycle, latency, slew, clock tree power, signal integrity and cross-talk. From these checks, which check we have to give more priority? Can anyone arrange these term acc. to priority in ascending order considering vario
Hi, I am comparing Plain synthesis Netlist vs Low power synthesis Netlist( i have only used clock gating low power technique). I am using Cadence Tools. i find that there are unmapped points in Low power netlist ( Red coloured "U") which is of clock gating as shown in the attachment. Should i ignore (...)
Hi guys, Ive designed 5 models of squarers and wish to compare propagation delay, area and power consumption. For delay, is putting a marker at input and then at stable output and getting the difference the correct way of doing this. Also, what is maximum combinational delay which is given in the synthesis report. Area, is number of slices and L
Liberty file contains a simplest timing view (simple versus spice), functionality description, power information for the std cell and any macros you need. I will say all synthesis tools must have this one to be able to transform a RTL code into netlist. And also the liberty must contains at least a flop and a AND gate.
Hello, I have a strange problem on mind....While doing logic synthesis, how does the input switching activity profile impact the output of a synthesis tool. Put in another way, can I develop a synthesis tool that would give me the most optimized netlist for a given input pattern such that the power consumption is the (...)
I am not sure if DC can be used for power estimation -- i think power compiler is the one .. not sure. Well it will read the vcd file and after synthesis it will report more accurate dynamic power - but no estimation here i feel.
Hello! I get a Verilog netlist after synthesis and convert it Spice netlist by nettran, I want use this Spice netlist inputting Nanosim for simulation. But some problems in the Spice netlist: 1. The Verilog netlist hasn't power and ground connections, so in the Spice netlist also missing the connections. What can I do add the connections during
Your assumption is wrong Initial blocks are synthesized as register power-on reset, except for some special cases where it's ignored by the synthesis tool. You'll be warned about it. I don't understand the connection of RS232 and reset pin. A FPGA can have a reset pin, and it's generally reasonable to implement it. A RS232 module should be a
Usually, synthesis tool will pick up tiehi cell in your standard cell library to implement logic "1". You don't have to do anything special.
HVT -> High Delay and Less Leakage LVT -> Less Delay and High Leakage The approach is, use only HVT from synthesis to Route. Allow LVT cells only after Post-Route Optimization, this will have less overall leakage. Again, it depends on the design & varies from design to design.
Hai all, At cts stage we are adding clock buffers then we have may have a chance of congestion then how we can face that problem? and by adding that buffers we have any power problems? how can over come that problems? Thanks...
Hi, I have a half adder and want a synthesized netlist out of it where in all the nand gates {for example} need to be considered as black boxes. I want to use the RC netlist directly in the final resulting netlist. Basically, I am looking at using HSIM for co simulation and then use prime time to generate the power numbers. Unfortunately, for