Auto plug-in and plug-out VGA port detection

摘要

Apparatus and method generally relating to load detection associated with an analog video port are disclosed. An embodiment of the apparatus for detection of a remote termination resistance includes a pulse detection circuit configured to generate a detection pulse within a blanking interval. A pulse insertion circuit is coupled to receive the detection pulse and is configured to insert the detection pulse onto a line, where the line is an analog color signal line.

主权项

1. An apparatus for detection of a remote termination resistance, comprising:
a pulse detection circuit of a pluggable adaptor to generate a detection pulse within a blanking interval; a pulse insertion circuit of the pluggable adaptor coupled to receive the detection pulse and configured to insert the detection pulse onto a line associated with a predetermine sync pulse window; wherein the line is an analog color signal line for a VGA display; and wherein the pluggable adaptor is configured to plug into a connector with an auto-detection pin to provide a bridge to a display device.