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Altera_Forum
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14 years ago

Programmable pull-up resistor in Cyclone II

Dear Sir, I've a question about the pull-up resistor. Suppose, the pull-up resistor is related to the I/O voltage Vccio and current strength, isn't it? Why does it show the resistor is a...
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Altera_Forum
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14 years ago

The example is in fact for Multi-IO voltage respectively level conversion, it uses the MAX II output in open-drain configuration. In the example, a minimum value based on the available output current is calculated. But in an application, a higher value may be appropriate.