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Groboards / giant-board-design-files

Giant Boards kicad design files
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USB VBUS clash? #2

Open thejpster opened 3 years ago

thejpster commented 3 years ago

ERC checks shows two USB micro-B ports with their Vbus pins tied together. If both are powered from 5V, the two 5V supplies will be connected.

Is one of them supposed to be a USB micro-A? Or should they have a BAT54C joining them together? Or should one port have its Vbus pin disconnected?

Groguard commented 3 years ago

There is a second connector on the bottom of the board to provide the USB-B/Host. 5V is not provided anywhere on the board so I tied VBUS together with both connectors if you need 5V for a USB device.

thejpster commented 3 years ago

Ah, OK. A USB-A host port of course supplies 5V, so that should be fine. Might be worth updating the part in the schematic to be a USB A not a USB B to make that clear.

Groguard commented 3 years ago

Might be worth updating the part in the schematic to be a USB A not a USB B to make that clear.

Sounds like a good idea. It makes it more clear that the second port is for Host.

thejpster commented 3 years ago

I've opened a PR for this.

thejpster commented 3 years ago

Hmm. My PR may not be quite right. Once the footprints are all sorted (see #7) I tried to "Update PCB from Schematic", and some of the nets associated with the USB connector changed. It's possible a USB micro-A/B connector has a different number of pins to a USB micro-B.