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Altera_Forum
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12 years ago

FPGA : Cyclone 1 Orcad problem

I am absolutely new to FPGA devices, so please excuse me for novice questions. I am designing a FPGA board using EP1C12Q240C8 of cyclone 1 device. I am using orcad capture for designing t...
Altera_Forum's avatar
Altera_Forum
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12 years ago

What you see in Orcad Capture is the "Schematic" model of the device. Pins can be placed anywhere on the graphic, and it doesn't matter as long as the associated pin number is correct. Most schematic models group the pins by function (Power supply, individual gates, busses etc).

When you go to roll the board in your PCB editor of choice, you will load in a "Footprint" model of the device, which is completely different than the schematic model. This model is the actual positioning of the pins for the package that you choose for the footprint. Anything tied to Pin 1 on your schematic diagram, gets routed to pin 1 of the footprint.