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hot plug detect (HPD)

Various interfaces such as High Definition Multimedia Interface (HDMI), DisplayPort, Digital Visual Interface (DVI) or PCI-Express have a control line for hot plugging.

When hot plugging is detected, a corresponding control signal, the Hot Plug Detect (HPD), is triggered. This control signal allows the receiver, which is the downstream station, to control actions of the transmitter. If a downstream station is connected, then it triggers an HPD signal. The upstream station recognizes from this that a downstream station has been connected. On the other hand, a downstream station can trigger an interrupt in an upstream device via the HPD signal.

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Englisch: hot plug detect - HPD
Updated at: 14.02.2019
#Words: 154
Translations: DE