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Altera_Forum's avatar
Altera_Forum
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18 years ago

Default drive strengths for Stratix III and Cyclone III

Note that Stratix III and Cyclone III default drive strengths on most I/O standards are set to OCT Rs for better signal integrity. On previous families they were set to max drive strength for best pe...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Signal integrity problems are very difficult to debug. A "likely to work" scenario is a little scary. I have started using signal integrity analysis tools like hyperlynx and this has helped me to discover potential problems in advance. This way I can tune my drive strength based on my board abd IO characteristics.

Have you looked at tools like this to decide the best drive strength to use?

FPGA Guy