USB Interface protection reference

RE: USB Interface protection reference

Priyanka — Wed, 09 Oct 2024 11:49:01 GMT

Hi,

I don't think we have such solutions or applications for USB isolators.

-Priyanka

RE: USB Interface protection reference

Search — Wed, 09 Oct 2024 03:02:58 GMT

Hi,

We currently don’t have any logs available. However, I will coordinate with our software engineers to start recording logs.

In our previous version, the USB DP and DN lines were directly connected to the PC. This setup exhibited performance issues, as the connection would drop after a certain period. We initially suspected that the issue was related to the computer’s power-saving strategy or the stability of the VBUS power supply. To address this in the current version, we changed the VBUS supply from a direct connection to an LDO supply.

I also have a question: USB isolators are common application circuits. Does Nordic have any mature or verified application solutions for this?

Regards，

RE: USB Interface protection reference

Priyanka — Tue, 08 Oct 2024 12:35:11 GMT

Hi,

Do you have any logs that you capture so that we can try to find what happens just before the disconnection?

Also, maybe you could try to temporarily bypass the isolation chip and connect the nRF52840 directly to the PC. If the issue persists, then it might be firmware or hardware related on the nRF52840 side. If it disappears, then the isolator is causing the issue.

Regards,

Priyanka