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Altera_Forum
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11 years ago

Help setting Cyclone III pins to 3.3V

Hello, I am trying to set two pins on the Cyclone III I'm using (EP3C120F780C7N) to work at 3.3V. I'm developing a custom slave I2C controller and the I2C bus will be 3.3V. I changed the pin ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Hey Dave,

Thanks so much for the reply. So I'm using the Altera Cyclone II development board from Altera. It sounds like the board is designed such that the bank of pins I'm using are powered as you said by 2.5V. So I can just use high impedance output 'Z' when I want a high and it will allow the bus to be pulled up to 3.3v?