You can assign multiple metal layers for the

Question

< U016Y9FMA2Y> You can assign multiple metal layers for the IO pins with `FP IO HMETAL` and `FP IO VMETAL` Other option is to change the `min distance` default 5um option in the script openroad or ioplacer tcl

Wajeh ul hasan · Answer

< Nguyen Dao> I have already assigned different metal layers I have played with the minimum distance as well What is `random seed` `place pins $opts ` ` random seed 42 ` ` min distance 5 ` ` hor layers $ env FP IO HMETAL ` ` ver layers $ env FP IO VMETAL `

Wajeh ul hasan · Answer

what s even more baffling is it says number of pins 2433 however I have 3033 pins

Nguyen Dao · Answer

I don t know < Manar Abdelatty> may have the answer

Nguyen Dao · Answer

What design are you working on I think you have too many IO pins that cannot fit to the design s boundary maximum number with your current area is 2433 Reduce the the core ultilization increase the design area will get more room for the IO placement but that s not good for the density

Manar Abdelatty · Answer

< Wajeh ul hasan> I think increasing the `DIE AREA` should help Another way to workaround this is to use `FP PIN ORDER CFG` file For some reason that I don t know of the custom IO placer can place pins in a small area better than the openroad placer

Wajeh ul hasan · Answer

I have increased the area from 1 5 to 4 mm^2 but to no avail Haven t tried `FP PIN ORDER` Let s see if that helps

Manar Abdelatty · Answer

< Wajeh ul hasan> Are you using an absolute FP The area might need to be increased in the X direction but not the Y or vice versa

Wajeh ul hasan · Answer

yes absolute oh why is that It places them on both X and Y `FP IO HMETAL and FP IO VMETAL` Did I miss something

Manar Abdelatty · Answer

< Wajeh ul hasan> Yes it places them on both X and Y boundaries In case you don t have an aspect ratio of 1 you will have more pins on the longer side

Wajeh ul hasan · Answer

Yes the aspect ratio is one so this wouldn t work either