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43 Threads found on Filler Cell
It seems like you have asked the same question a million times already. What have you tried on your own to debug the issue? Have you read any documentation from the tools? Do you know how the mapping file format works? If not, why not? It is all described in the Encounter documentation. This missing filler cell issue for instance. It is incredibl
Hi, I know there are multple threads about this question. But did not find what was I looking for, I know Endcap at the end of rows and around macro, fillers in between design to fill the gaps n well continuity, and Decap for IR drop to give exra capcitance... My question is what End cap has so special that it will be placed at the end of
Hi All, Which type of filler cells should add in soc encounter,I have fill 1,2,4,8,16,32,64 sized and for well tap and end cap also the same values. Which size should i add ?? also while adding end cap cells,it is asking for precap cell and postcap cells ?? What i shud specify among the (...)
Hi all, Please can me someone explain differences between these terms? macro cell filler cell ECO cell all are taken from TSMC 90nm PDK documentation. Thanks a lot.
Standard cell Site & Unit Tile: is the minimum width of the small largest cell, generally the smallest filler. The terminology difference could comes from different backend tool (Astro-ICC versus SE-SOCEncounter). Placement grid: the grid is generated by the backend tool based on the unit tile.
when i finish route in icc,use the insert_stdcell_filler command to insert filler cell, the tool reports : Error: cell *** was not placed on row also in the log it says there are 52 cells are overlaps or not placed on row,is anyone meet this error before? how to fix it
Hello Guys, Recently I studied some where regarding filler cell like this can any one please explain the following statement in detail. filler cells also provide decoupling capacitance to complete the power connections in the standard cell rows and extend N-well and P-well regions. Previously I (...)
well, normaly the std cell library provided some filler cell to fill the n-well and power rail between two std cell. but this step should be done by the PnR tool, not in virtuoso, or do you made a small block in the analog tool env? The filler cells are here to respect the DRC between two (...)
In my chip layout I got a DRC error stating LATCH UP; but after inserting the filler cells I didn't get a DRC error due to LATCH UP; So please tell me how filler cells prevents LATCH UP (as it is an empty cell without any function)
hi friends, i have one doubt. we are using filler cells in between physical design flow right, and metal filling is used at the final stage. what is the difference in between these two?? can any one explain on this
Hello people! I am trying to do floor planning for my design for the first time. Actually I have done the basic fllorplanning and have placed the i/o pads as well but not the macro cells ( placement in the core area) yet. I verified the geometry after this step and found a lot of spacing violations and short violations at the corner pads. I cor
Normaly the pad library should provide a filler for the smallest grid possible in the relatede technology. Same idea for the std cell filler.
what is pad cell? what is the difference between filler cell n corner cell? though they both used for continuity
Hi what is seal ring ? what is SR_DPO ? how is it different from normal PO. i saw a filler cell layout and i find DPO running over OD with its source and drain unconnected. Can we have such unconnnected transistors??? Please help me out of this confusion
I need to delete some filler cell black box in GLS. Command used was: delete black box filler* -module y804lf -revised The Problem is: // Error: Module 'filler*' is not found in Revised. // Error: 'y804lf' in Revised is not USER black box. Any idea why i cant delete it? it says the cell is not (...)
Hi All, I would like to add my points here. Spare cell : ( Placed before the Placement to avail the uniform distribution) These cells will be used if any Timing/Functional ECO has to be performed after the Tape-out. Generally these cells will be a bunch of universal gates and placed uniformly all over the chip. Lets say your chip is
by adding filler cells in core area how timing will effect? which capacitance will come into picture?
hai, Endcap is placed at right or left most boundary filler cell for isolation of routing . Route is not beyond endcap does not allowed to routing come out side beyond endcap. i think the name itself its defintion. Add endcap.tcl modified script enable to add a double coloum of tie fillercell (dummy poly gate for (...)
Hi Guys. why do we need to add filler cells first before Routing ? Thanks!
In our stdcell library, most often we satisfy diffusion density rules by first filling with decap cells. Otherwise, I have also seen filler cells that contain tied off "spare" transistors. Both these types of cells add to the leakage current, which is something we want to control. Has anyone had (...)