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I have a design consisting of 32 bit input pin sitimulis problem

ahmed osama

 I am using spectre as simulation tool , my design have 32 bit input pins how i can assign this bits with values

I use vector file but it works fine with single bit , when i increase radix more than 1 it fails

I use sitimulis file but it also fails 

what is the most effective way to test 32 bit input pins in spectre 

Thanks

Parents

  • This my vector file 

     ; enable generation of expected output vectors and comparison result waveforms.
    ;output_wf 1
    ; radix specifies the number of bit of the vector.
    radix 2 2
    ; io defines the vector as an input or output vector.
    io    i i  
    ; vname assigns the name to the vector.
    vname A[[1:0]] B[[1:0]]
    ; tunit sets the time unit.
    tunit ns
    ; trise specifies the rise time of each input vector.
    trise 0.01
    ; tfall specifies the fall time of each input vector.
    tfall 0.01
    ; vih specifies the logic high voltage of each input vector.
    vih 1.1
    ; vil specifies the logic low voltage of each input vector
    vil 0.0
    ; voh specifies the logic high voltage of each output vector
    voh 1.1
    ; vol specifies the logic low voltage of each output vector
    vol 0.5

    0  3 3

    10 1 1

    this is the error

    Only one connection to the following 4 nodes:         A0         A1         B0         B1     No DC path from node `A<0>' to ground, Gmin installed to provide path.     No DC path from node `B<0>' to ground, Gmin installed to provide path.     No DC path from node `A<1>' to ground, Gmin installed to provide path.     No DC path from node `B<1>' to ground, Gmin installed to provide path.

Reply

  • This my vector file 

     ; enable generation of expected output vectors and comparison result waveforms.
    ;output_wf 1
    ; radix specifies the number of bit of the vector.
    radix 2 2
    ; io defines the vector as an input or output vector.
    io    i i  
    ; vname assigns the name to the vector.
    vname A[[1:0]] B[[1:0]]
    ; tunit sets the time unit.
    tunit ns
    ; trise specifies the rise time of each input vector.
    trise 0.01
    ; tfall specifies the fall time of each input vector.
    tfall 0.01
    ; vih specifies the logic high voltage of each input vector.
    vih 1.1
    ; vil specifies the logic low voltage of each input vector
    vil 0.0
    ; voh specifies the logic high voltage of each output vector
    voh 1.1
    ; vol specifies the logic low voltage of each output vector
    vol 0.5

    0  3 3

    10 1 1

    this is the error

    Only one connection to the following 4 nodes:         A0         A1         B0         B1     No DC path from node `A<0>' to ground, Gmin installed to provide path.     No DC path from node `B<0>' to ground, Gmin installed to provide path.     No DC path from node `A<1>' to ground, Gmin installed to provide path.     No DC path from node `B<1>' to ground, Gmin installed to provide path.

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