pll simulation

[Altera_Forum]

Hello, 

I have to use a pll in my design. so I've created a pll via megawizard with my needs. 100Mhz clock input and 5nsec shifted clock in the output.  now, I want to simulate my design with modelsim. how can I do that? where should I place the PLL.vhd component, I put it inside top.vhd and i am getting errors "Unknown identifier" to all pll I/Os.   can you assist?

[Altera_Forum]

Hello, 

 Wrap it inside an entity that is then instantiated in your testbench. Keeps the same entity as top in Quartus.  Don't know how correct it is - but it works for me :)   M.

[Altera_Forum]

My design hierarchy is : TestBench -->top level-->Pll 

 did you do the same?

[Altera_Forum]

Yeah, pretty much. Modelsim needs an altera library to simulate their things tho, altera_mf if I remember correctly. When defining you pll in the megawizard you need to check off that one also.

[Altera_Forum]

It works, 

Thanks!!!:)