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Determines whether the digital input and output resource reads external input or writes output.

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reference in

A reference to an FPGA I/O resource.

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enable?

A Boolean that determines whether the specified DIO resource is set to read or write. Wiring TRUE to Set Output Enable for a digital line allows the resource to write data. Wiring FALSE to Set Output Enable allows the resource to read external data.

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reference out

A reference to an FPGA I/O resource.