Other Parts Discussed in Thread: TMDSCNCD280039C,
Tool/software:
Hello,
We've started running the labs as indicated in the design guide and are encountering some communication issues.
The first problem we encountered is communicating with the controller board (TMDSCNCD280039C). When this controller is not connected to the TIDM-02013, it works correctly. We can program and debug without problems.
However, when we connect the board to the TIDM-02013, it no longer works and the following error appears:
As you can see the application is not able to connect to the controller.
Analyzing the schematic, we see that there's an isolator that could be causing problems. We see two outputs connected in parallel: the controller and the isolator. This is the insulator that could be causing the problems:
We have taken some captures with the oscilloscope and this is what we have observed in the JTAG clock signal:
As you can see, the voltage levels are not adequate, as the low voltage level does not drop below 2V. This is due to the connection between the isolator and the controller.
We proceed to desolder the insulator referenced as U51 on the board and then it starts working. We can program the board and debug with the controller connected to TIDM-02013. This is the oscilloscope capture:
With this we would have solved the primary communication problems but when we start performing the laboratory tests there comes a point where communication is lost, specifically in test 5.2.2.2.4 and when we have the load of 40 OHMS and we reach an input voltage on the DCLINK of 80V.
These are the messages the application displays that prevent us from continuing to work. At the moment, we have no idea what could be wrong. Any ideas? It's important to solve these communication losses because otherwise, we won't be able to continue developing the project.
We look forward to hearing from you and thank you very much for your help.
Juan Carlos
