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Altera_Forum's avatar
Altera_Forum
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16 years ago

altera_mf

Hi All,

I install the Quartus II 9.0 sp2 web edition with the ModelSim 6.4a Starter Edition (for Quartus II 9.0). I'm trying to simulate the ALTPLL that i build using the MegaFunction Wizard. When i'm geting the PLL out from reset (drive to low) the ModelSim stop on Fatal error (sometimes also crash), the cause of the error point to the altera_mf.vhd file line 7938.

# ** Note: Cyclone II PLL was reset# Time: 0 ns Iteration: 5 Instance: /tbde2/uut/pixelclock/altpll_component/cycloneii_altpll/m3# ** Fatal: (SIGFPE) Floating point exception.# Time: 95 ns Iteration: 5 Process: /tbde2/uut/pixelclock/altpll_component/cycloneii_altpll/m3/schedule File: C:/altera/90/modelsim_ase/win32aloem/../altera/vhdl/src/altera_mf/altera_mf.vhd# Fatal error in Process schedule at C:/altera/90/modelsim_ase/win32aloem/../altera/vhdl/src/altera_mf/altera_mf.vhd line 7938#

Could any one help me on that?

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    I don't know if it's causing the fatall error, but for any designs involving a PLL, the time unit must be changed from default 1 ns to 1 ps, otherwise the PLL simulation doesn't work.