Categories

{{ selectedCategory.name }}

{{ topic.Title }} {{ topic.Ddate | formatDate }}

{{ topic.Content }}

No topics found!

Signal integrity issue

31-Aug-2023

Non-optimal Target PCB design (different line lengths, vias, stubs etc.) and other hardware accessories (connectors, power supply etc.) can degrade the electrical signals. Therefore while transferring information at high-frequencies from Target CPU to the BlueBox, signal integrity issue can be indicated in winIDEA as follows:

  • Corrupted data visible in the Trace Window (e.g. different addresses than the actual variable).
  • Renesas RH850: Error 250: Cannot connect to the CPU Debug Unit. Possible signal integrity issue.
  • Infineon TriCore: Error. Debug communication error.
  • ARM Cortex, NXP/ST Power Architecture, Renesas RH850 - Parallel Trace Capture method:  Error. Please perform the Trace port calibration. or small data eye after performing the Trace Line Calibration test.


Possible solutions:

  • Connect the BlueBox Debug Adapter directly to the Target. Additional adapters between BlueBox and Target worsen signal integrity.
  • Use a shorter ribbon cable between the BlueBox connector and the Debug Adapter. We offers ribbon cables in different lengths.
  • Use a stable “noise-free” power supply. 
  • Power the BlueBox, PC, and Target from the same power outlet.

    • Reduce debug clock in Hardware / CPU options / SoC.
    • Select fixed voltage instead of Vref in Hardware / CPU Options / Hardware


    Possible solutions for specific configurations

    ARM Cortex, NXP/ST Power Architecture, Renesas RH850 - Parallel Trace Capture method

    Run and rerun the Trace Line Calibration test for longer periods of time to find an optimal sampling position. 


    NXP/ST Power Architecture, Renesas RH850

    Check if all MDO (Message Data Out) signals are correctly connected to Mithe ctor Debug Adapter.

    Was this answer helpful?

    Sorry this article didn't answer your question, we'd love to hear how we can improve it.
    Note: This form won't submit a case. We'll just use it to make this article better.

    Similar topics

    {{ topic.Title }} {{ topic.Ddate | formatDate }}

    {{ topic.Content }}

    No similar topics found!

    Other topics in the same category

    {{ topic.Title }} {{ topic.Ddate | formatDate }}

    {{ topic.Content }}

    No topics found!