pci_mt32 doesn't behave as specified in User Guide

[Altera_Forum]

Hi all, 

 I have been checking out this forum for a while, but this is my first post. I have a small problem with the Altera pci_mt32 module which I don't know how to resolve.  Background: I am using a StratixII GX device and have instantiated the pci_mt32 component using the Quartus Mega Wizard tool. I am currently testing the pci_mt32 module using ModelSim. The pci_mt32 is connected on one side to my local design, while on the other to the testbench generated by the Quartus tool.  Problem: Using ModelSim I can see that the device does not behave as it should. Namely, while doing a single memory write the pci_mt32 module doesn't assert the lt_ackn and lt_dxfrn signals. Furthermore when I do a burst write, the lt_ackn and lt_dxfrn signals are not asserted for the first data sample, but they are asserted for the rest of the burst.  Obviously this is a problem as I can't write a single value via the pci_mt32, and also when doing a burst I can not write the first value in the burst.  Has anyone encountered this problem before?  Thanks in advance.

[Altera_Forum]

--- Quote Start ---  Hi all,  I have been checking out this forum for a while, but this is my first post. I have a small problem with the Altera pci_mt32 module which I don't know how to resolve.  Background: I am using a StratixII GX device and have instantiated the pci_mt32 component using the Quartus Mega Wizard tool. I am currently testing the pci_mt32 module using ModelSim. The pci_mt32 is connected on one side to my local design, while on the other to the testbench generated by the Quartus tool.  Problem: Using ModelSim I can see that the device does not behave as it should. Namely, while doing a single memory write the pci_mt32 module doesn't assert the lt_ackn and lt_dxfrn signals. Furthermore when I do a burst write, the lt_ackn and lt_dxfrn signals are not asserted for the first data sample, but they are asserted for the rest of the burst.  Obviously this is a problem as I can't write a single value via the pci_mt32, and also when doing a burst I can not write the first value in the burst.  Has anyone encountered this problem before?  Thanks in advance.  --- Quote End ---   Hi,  I have exactly the same problem. Did you manage to find a solution?  Regards, Grant

[Altera_Forum]

Found the problem. The pci_mt32 core was being clocked by a PLL and not directly from the pci clock pin.