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Altera_Forum's avatar
Altera_Forum
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17 years ago

5 V in and out

Now my little project is almost finished. The last problem is how to get 5 V out from the board (Terasic micro kit). The board is connected to USB port and it outputs 3.3 V. But I want to read signal...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

MAX II has no 5V-tolerant I/Os. Please consult the MAX II device manual to learn about supported I/O standards, particularly the multivolt i/o interface chapter. The most simple variant is to use a series resistor and enable the PCI clamp diodes, which are available for the Bank 3 I/O-pins. But 5V input should be applied then in configured state of MAX II only. Or use level translators.