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Altera_Forum's avatar
Altera_Forum
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11 years ago

FPGA setup / hold times

In order to constrain I/O timing I need the setup and hold times of the device I am interfacing with. Usually that can be found in the data sheet of that chip. But what if I am interfacing wi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

kaz, I'm not sure I really understand your answer.

Say FPGA 1 communicates with FPGA 2.

Now I want to write the I/O constraints for FPGA 1.

For that I need the Tsu and Th of the external device, i.e. FPGA 2.

For these I/O constraints I am supposed to use arbitrary values?

And then look where? The report (of FPGA 2) or the data sheet?