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Altera_Forum's avatar
Altera_Forum
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15 years ago

Drive strength settings

Hello: Just starting with FPGA design When the FPGA (cyclone II) drives pins into a device with a specific loading value (i.e 10pf) , is there a calculation or rule thumb to estimate wha...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

A simple option is to calculate a (dynamic) output impedance from dV/dI gradients in Ibis files. Ther are also signal integrity tools that import Ibis data, but I don't use them.