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What is D port on laptop?

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What is D port on laptop?

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D+ and D- are the differential pair lines for USB. They should be connected to D+ and D-, respectively, of the host circuit. Additionally, a 15k\u03a9 pull-down resistor is needed on each D+ and D-. VCC needs to be connected to a 5V supply (which could come from the host circuit, if available).

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