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Altera_Forum
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15 years ago

High analog input for DE1

Hi Doe's anybody knows how can analog signal that is higher than 3.3V be connected to the FPGA input? (without additional HW beside the DE1). Thanks Eyal
Altera_Forum's avatar
Altera_Forum
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15 years ago

DE1 has no input protection on GPIO inputs, only 47 ohm series resistors. Depending on the speed requirements, you can use level translator ICs or voltage dividers for the input signals to FPGA.