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Altera_Forum
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14 years ago

Weak pull-up resistors

Hi everyone! I enabled weak pull-ups for the input and output pin (cyclone II device). But when I measure the voltage on these pins, on the input pin is 3V and on the output pin is 0V. Shouldn...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Hello everyone, I think I finally found a solution to the problem. I used an external power supply to power my peripheral and that apparently caused the problem. Now I am using the power supply from the fpga board. I think I powered my peripheral after powering fpga, but since they were connected, the peripheral was back powered from I/O lines before applying the power to it. Thanks very much! Now I am going to test it properly to see if it works flawlessly.