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Altera_Forum's avatar
Altera_Forum
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15 years ago

What does this "pu1" of the clk means in the modelsim-altera ?

What does this pu1 of the clk means in the modelsim-altera ?

The verilog codes of the cam in the cookbook (http://www.altera.com/literature/manual/stx_cookbook.pdf). There's 5 files:

ram_block.v

ram_based_cam_tb.v

ram_based_cam.v

cam_ram_block_tb.v

cam_ram_block.

All the files are compiled in the Quartus 11 successfully.The 2 testbench files (ram_based_cam_tb.v & cam_ram_block_tb.v) are also successful,but in the Modelsim 6.6 ,the waves are wrong, the "clk" is "pu1", what does this means? How to correct it ?

2 Replies

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

    "pu1" means pull up high. It's a state to model outputs with pull up resistors.

    Are you simulating the correct file? You should be simulating one of the test benches (_tb).
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    clk is pu1 ...

    I know the license of the Altera-modelsim is error, but in modelsim

    ,It is successsful that running these codes by importing the megafunctions of altera Manually ! There is no clk pu1