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Altera_Forum's avatar
Altera_Forum
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14 years ago

GPIO MHz Operation, What is OK?

I am using the DE1 board with EP2C20F484C7. I am wanting to send out data to external custom circuitry: op-amps, fiber optic drivers, etc. I want to send data at about 25MHz max if I can. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

is this for ADAT or TOSLINK? looks like fun

ideally you would do simulations on your I/O using IBIS models and HyperLynx or compatible software. you stick in a model of the FPGA I/O, a model of the trace, and the far side I/O model. you can then tweak the drive strength, slew rate, and termination resistors to optimize the signal integrity

on the other hand that may be overkill for a senior project