Issue with STUSB1700 Negotiating BMS with SYNC

[ahmed-productshop]

Hello,

I am currently integrating the STUSB1700 into a custom circuit board design. However, I am facing an issue where the STUSB1700 is unable to negotiate the Battery Management System (BMS) with the SYNC protocol.

To provide more context:

• The Saleae logic analyzer captures the transmitted packets, but the negotiation fails, and I have observed the following anomalies:
  • Missing EOP in some transactions.
  • CRC errors in specific messages.
• I have attached a screenshot of the packet view from the Saleae logic analyzer for reference.

Additionally, I have included a schematic of my circuit for review. I would appreciate guidance on:

1. Whether the circuit design might be causing this issue.
2. Specific debugging steps I can take to isolate the problem.
3. Any recommended register or configuration changes for the STUSB1700.

Thank you in advance for your support!

Ahmed