[nRF52840] Trace routing via D+ or D- pins.

[Krzysztof Rosinski]

Hello,

Is it possible to route GPIO trace via D+ or D- pin when USB is not used, please? We have VBUS connected to GND.

Kind regards,

Krzysztof

[Daniel Chisholm]

Probably not, based on this snip from the product specification "nRF52840_PS_v1.1.pdf"..?

(edit to add: sorry it looks like I misunderstood the question, so the above info isn't relevant)

[Krzysztof Rosinski]

Hi, this is not what I mean. I don't like to use D+/D- as GPIO pins. In the layout, I would like to use AC9 but route the trace from AC9 via AD6. 

[helsing]

Hi Krzysztof,

I will need to double check. I will get back to you over the weekend.

Best regards,

Håkon

[Krzysztof Rosinski]

Thank you,

Best regards,
Krzysztof

[helsing]

Hi Krzysztof,

My initial thought was also to reply "Probably not". I have now checked with other team members who say it is not recommended. VBUS, D+ and D- belongs to a different power domain than the GPIOs and also have internal hardwired circuitry.

Best regards,

Håkon