huge pain Creating a Custom Component with lots of pins

[smithman]

hello

I am trying to create an ATmega 128 MCU in multisim that I plan on using to layout a pcb in utiliboard with. SInce this is just for pcb layout purposes I can care less about adding a spice model. I did the "component wizard" and selected "layout only (footprint)" I chose the TQFP-64 package and all is well. I get to step 4 where i "set pin parameters" and this is where I enter the names of the pins. The problem is that this takes a long long time. I thought there has to be some way to import the pin names from a spreadsheet but I couldnt find any way! The only way I can add them is by selecting each cell in excel and copying then going to multisim and selecting the next cell and pasting. I cannot copy and paste a whole column. This would take hours to do for a chip with over 100 pins. The next step "map pins" takes a long time too. I have to individually click between the cells. Is there any way to map everything at once using the same order?

Also unrelated question. whats the difference between the "TQFP-64" and "TQFP-64L" in multisim? the look identical to me, not sure what the L suffix does.

Thanks

[Tayyab_R]

Hi smithman,

It is not possible to import pin names from an excel spreadsheet at this time. I will pass on your concerns to R&D.

The "TQFP-64" and "TQFP-64L" are quite different if you take a closer look at them. It depends on the manufacturer which one they use for their parts.

Sorry I could not be of more help.

[Tien_P]

Hi Smithman,

Just to update you, we recently released a Digi-Key tool and it will create large IC for you.  This tool allows you to import .csv file containing pin name, pin number and you can create single or multi-section part using this tool.  For more information, please refer to the following link:

https://decibel.ni.com/content/docs/DOC-26943