For the love of god, someone show me officially how a USB 1.1 device is wired.

[K3mHtH]

Looking for an official document or datasheet that shows exactly how USB 1.1 wants a DEVICE connector to be wired internally. I've read at least 5 different answers online:

1: Leave Shield Disconnected, it's already grounded at the host.
2: Connect Shield to Ground.
3. Connect Shield to Ground via 1M and 4.7nF  RC.
4. Connect Shield to Ground via inductor/ferrite.
5. Connect Shield to Ground via 1M and many capacitors.


I've only found this document ( http://esd.cs.ucr.edu/webres/usb11.pdf ) and the only thing it says is:

6.8 USB Grounding
The shield must be terminated to the connector plug for completed assemblies. The shield and chassis
are bonded together. The user selected grounding scheme for USB devices and cables must be consistent
with accepted industry practices and regulatory agency standards for safety and EMI/ESD/RFI.

[ataradov]

There is no "official" method. The spec is a copout that says nothing useful. The easiest thing you can do is not overthink it and just connect everything  to the ground.

You may argue for not connecting it on the device side, but all the resistors and capacitors are pure voodoo nonsense.

[ArdWar]

There may be a case to not connect the shield if your device may be powered by class I PSU separate from its host, but most devices don't do that and you shouldn't design yours that way either.

[u666sa]

1: Leave Shield Disconnected, it's already grounded at the host.
2: Connect Shield to Ground.
3. Connect Shield to Ground via 1M and 4.7nF  RC.
4. Connect Shield to Ground via inductor/ferrite.
5. Connect Shield to Ground via 1M and many capacitors.

Specification calls for maximum of 5 meter length. As you know, often with long USB cables bad things happen. No connection. Intermitten connection. Decreased bandwidth. At the minimum you should connect shield to ground. Other methods could be useful as well. It depends how your cable acts with 3 to 5 meter length.