Forum Discussion

haduchieu's avatar
haduchieu
Icon for New Contributor rankNew Contributor
7 months ago

Signal counts incorrectly on EP4CE6E22C8N while others signal work fine (same code Verilog)

I am facing a strange issue on FPGA EP4CE6E22C8N (Cyclone IV), i use quartus II 13.0 and signaltap to debug.   I have three input signals running in parallel, using the same HDL code and the same t...
Core Logic
Programmable Logic Device
ShengN_altera's avatar
ShengN_altera
Icon for Super Contributor rankSuper Contributor
7 months ago

May I know which signal is correct and which signal is problem one?

  • haduchieu's avatar
    haduchieu
    Icon for New Contributor rankNew Contributor
    7 months ago

    hello, the problem has overed when i connect board to oscilloscope, must be impedance matching problem about my board