The type-C connectors are reversible, so the actual communication might
happen on CC1 or CC2 depending the polarity of the plug inside the receptacle.
+
Data
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-Captured Between a Google Pixel 2015 laptop and both its 5V/12/V/20V power
+Captured between a Google Pixel 2015 laptop and both its 5V/12V/20V power
supply and an USB-C to HDMI video dongle.
The sigrok command lines used were: