Hot Plug
PCI Express supports native hot-plug though hot-plug support in a device is not mandatory. Some of the elements found in a PCI Express hot plug system are:
Indicators which show the power and attention state of the slot.
Manually-operated Retention Latch (MRL) that holds add-in cards in place.
MRL Sensor that allow the port and system software to detect the MRL being opened.
Electromechanical Interlock which prevents removal of add-in cards while slot is powered.
Attention Button that allows user to request hot-plug operations.
Software User Interface that allows user to request hot-plug operations.
Slot Numbering for visual identification of slots.
When a port has no connection or a removal event occurs, the port transmitter moves to the ...
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