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OldMarty's avatar
OldMarty
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4 years ago

How do i actually edit a schematic logic symbol ???

Hi All, As the tile says "How do i actually edit a schematic logic symbol ??? " Here's an example, lets say i have an 8 input AND gate on my schematic layout, and i want to make a new symbol fr...
Nurina's avatar
Nurina
Icon for Regular Contributor rankRegular Contributor
4 years ago

Hi,


What you can do is use an 8-input AND gate and 2-input AND gate and use the outputs of both gates as inputs for a 2-input AND gate in one bdf file. After saving this bdf file go to File->Create/Update->Create Symbol Files for Current File


Then you have successfully created a new symbol. You can find this symbol in the symbol libraries under "Project".


Regards,

Nurina


OldMarty's avatar
OldMarty
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4 years ago

Hi Nurina,

Thanks, what i did was wire 2x "or8" gates into a "or2", making a 16 input or gate.
It took me a while to realise i had to add in/out pins to the gates and label them etc. (because my first symbol was an empty box).

Then i discovered after creating the symbol file that i also had to create a verilog file too. (i learned this from somebody's online school project).

Are there intel links to this information please?

  • OldMarty's avatar
    OldMarty
    Icon for New Contributor rankNew Contributor
    4 years ago

    Hi again,

    I also noticed that i can only use primitive devices to make my own symbol files. If i use simple and,or,not gates it works, but if i decide to include any of the 74xx chips into the symbol design then there are errors and it wont compile.

    Is there a way to use the 74xx chips in my symbol file?, or is there a way to view the internal primitives of the 74xx chip to let me cut & paste into my own design file?

    Thank you.