flote21
Advanced Member level 1
Hello!
I am wondering about the issue described on the title of this thread.
I am using a crosslink-nx from Lattice to adapt video Interfaces. And during the serial production of the PCBA, 10% of the units are not working as expected.
In normal working, the FPGA should drive an RGB display, displaying a clear bar test pattern:
However the issued PCBAs are having the following behavior:
The issue looks to have a high depending on the temperature changes, because after some minutes of working, it starts to work fine displaying the clear color test pattern showed in the first picture. However the issue is always happening at low temperatures (typically below 0 degrees).
Finally after checking and measuring the correct shapes of all the RGB interface signals, i have decided Re-flashing the SPI memory flash of the FPGA and it solved all the issues in all of the problematics PCBAs.
Does anyone has any idea about what could happen? I woule appreciate whatever hint or tip to continue investigating this topic.
Thanks in advance.
Greetings.
I am wondering about the issue described on the title of this thread.
I am using a crosslink-nx from Lattice to adapt video Interfaces. And during the serial production of the PCBA, 10% of the units are not working as expected.
In normal working, the FPGA should drive an RGB display, displaying a clear bar test pattern:
However the issued PCBAs are having the following behavior:
The issue looks to have a high depending on the temperature changes, because after some minutes of working, it starts to work fine displaying the clear color test pattern showed in the first picture. However the issue is always happening at low temperatures (typically below 0 degrees).
Finally after checking and measuring the correct shapes of all the RGB interface signals, i have decided Re-flashing the SPI memory flash of the FPGA and it solved all the issues in all of the problematics PCBAs.
Does anyone has any idea about what could happen? I woule appreciate whatever hint or tip to continue investigating this topic.
Thanks in advance.
Greetings.
