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Altera_Forum's avatar
Altera_Forum
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16 years ago

Urgent! hardware interface between FPGA DE2 board(3.3V) and ADC(5V)

HI, may i ask your guys a favor. I am using DE2 board for my project and i need to interchange signals(SPI) to an ADC. The ADC is 5V for logic high but the max output signal for DE2 board is only ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Sorry, i don't understand why a pull-up resistor is involved in your level translation circuit. If so, there may be a problem of the resistance value. I made a clear suggestion, but I don't know, which circuit you actually implemented. You may want to show a schematic.

Apart from level translator circuit details, there may be a problem of inadequate wiring.