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Altera_Forum
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16 years ago

What is the meaning of 'Value' to be set for Output Enable Group?

Can somebody tell me the meaning of 'Value' for Output Enable Group that can be set in assignment editor window? what is the integer value should we set for each signals? Can we set the value randomly? It is good is someone can provide me an example.

What is the function of output enable group?

Thank for helping.

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  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    You can choose an arbitrary number for each output enable group. The pupose of the output enable group is to help in checking Quartus I/O rules. E.g. bidirectional pins of a DDR2 interface would be only allowed to be placed adjacently, if they belong to the same output enable group. Then it's guaranteed, that one pin won't work as input while the other is enabled as output.

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