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Altera_Forum
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17 years ago

Alternative to weak pull-up for I/O during configuration?

Hello, I've got the following problem: I use a Cyclone II FPGA in a complex design. Some User I/Os are connected to npn transistors. The problem is, that during configuration thru an epc...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Today I talked to an FAE from my distributor and he told me that possibly in Cyclone IV devices it might be possible to choose between weak pull-up and weak pull-down I/Os during configuration. A special PIN has to be hard-wired for selection, but these are plans for the future. I think I'll leave my design unchanged because it works well. In a re-design of the PCB I use some unused inverters to meet my requirements.

Thanks for your suggestions!

Stefan