Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)
17250 Discussions

Megafunction ALTPLL simulation Problem

Altera_Forum
Honored Contributor II
1,543 Views

Dear all, 

 

Please help me with this issue: 

 

I want to simulate Megafunction ALTPLL in ModelSim, 

The result of ModelSim compilation is no Error, but the output is High Z 

The waveform is shown in attached file "PLL_waveform.jpg". 

 

(1)The Resolution of Modelsim is set to ps. 

(2)altera_mf.v and 220model.v are included. 

 

Would you please give me a hint or a direction to debug this? 

 

Thank you in advance! 

 

Best Wishes, 

William
0 Kudos
3 Replies
Altera_Forum
Honored Contributor II
704 Views

did you search the log for warnings? i would look for a component not bound to start 

 

which family of ModelSim are you using (AE/SE)?
0 Kudos
Altera_Forum
Honored Contributor II
704 Views

Hello thepancake, 

 

Thank you for responding. 

I didn't see any warnings about PLL or megafunction. 

 

Best Wishes
0 Kudos
Altera_Forum
Honored Contributor II
704 Views

hi, 

 

I go the same problem too. using the DE0-Nano board and follow the ALTPLL and Mux design in the baord user guide. when doing the Modelsim RTL simulation with lpm_ver and altera_mf_ver included, the C0 output just get hiZ. any advice? 

 

I convert the bdf to verilog format before using nativelink to trigger the modelsim-altera simulator. the C0 output just show hiZ. dont know why? I attached my project design file here, pls help.
0 Kudos
Reply