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UCD9248: Unable to communicate UCD9248 on VC707

Part Number: UCD9248

Tool/software:

Hi

I want to monitor the power supply on the VC707.

But, when I start Fusion Digital PowerDesigner with the VC707 powered on, the following screen appears, and after about 20 minutes the software fails.

The VC707 is an evaluation board manufactured by AMD and uses three UCD9248 chips.

The VC707 is connected to the computer via GPIO-TO-GPIO2.

When I unplug GPIO-TO-GPIO2 from the computer and start it up, it says that the USB adapter cannot be found,

so GPIO-TO-GPIO2 is recognized.

When I remove GPIO-TO-GPIO2 from the evaluation board and start it up, it will fail after about 30 seconds,

so there must be some communication going on while GPIO-TO-GPIO2 is inserted.

Please tell me why I can't communicate