PORTS Forum
Ports and Interfaces => USB => Topic started by: jb on February 12, 2021, 12:25:03 pm
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USB Type-C Spec R2.0 - August 2019.pdf
For all the cables with plugs at both ends, it says
- "All Ground return pins shall be connected together within the USB Type-C plug."
- "Shield and GND grounds shall be connected within the … plugs on both ends of the cable assembly."
For the adapters with receptacles on one end, it just says:
- "All Ground return pins shall be connected together within the USB Type-C plug."
So the Shield should not be connected to the grounds in these adapters? Anyone know why?
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Just a guess, but perhaps the short length doesn't require it.
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OHHHHHH there's an ECN!
USB Type-C ENGINEERING CHANGE NOTICE
USB Implementers Forum
Form 20140811-ECN
Page: 1
Title: Adapter Assembly Shield Grounding Clarification
Applied to: USB Type-C Specification Release 2.0, August 2019
"All Ground return pins shall be connected together within the USB Type-C plug."
was changed to
"Shield and GND grounds shall be connected within the USB Type-C plug and USB … receptacle on both ends of the adapter assembly."
How frustrating that they don't just update the main document.
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Thank you for posting this. I agree that updating the original docs would be useful.