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Altera_Forum's avatar
Altera_Forum
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18 years ago

communication with 3.3V devices with cyclone 3

Hi! Currently I have design board with cyclone 3. Cyclone 3 VCCIO supplies are connected to 2.5V. Other devices have 3.3V voltage supply. Regards to Cyclone 3 manual, it can be directly con...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Probably the optimal solution is used 3.0V for IO? Since no external termination is required. Also 3.3V logic can be driven without external components with 3.0V FPGA output.

Thanx, Amir