[MOVED] vlsi CHIP DESIGNING.

[velu.plg]

how to design 64 bit LFSR ?

MY DOUBT IS FOR WHICH BITS I HAVE TO PERFORM XOR OPERATION...

 

[Mohammed_Verification]

Re: vlsi CHIP DESIGNING......

how to design 64 bit LFSR ?

MY DOUBT IS FOR WHICH BITS I HAVE TO PERFORM XOR OPERATION...

Hi sun_ray,

For 64 bit lfsr you will assign input as [63:0] data

so you have to take xor operation for 63rd and 62nd bit.

Hope itmay helpful to you...

 

[velu.plg]

how to check 2^64 combinations in modelsim simulator.....

have u try dis....

 

[Mohammed_Verification]

how to check 2^64 combinations in modelsim simulator.....

have u try dis....

Hi velu.plg, Sorry I can't get you please be clear with your question.

can you elaborate your question....

 

[velu.plg]

I am asking that how can we check all possible combination of the sequence (2^64 means its a 20 digit value how can we see the output after all these sequence occurs..)and also i want to check whether no sequence is getting repeated...

 

[Mohammed_Verification]

Hi velu, please go through the topic on Path Sensitization and Boolean Difference method to reduce the test Pattern and to avoid the repeating sequences.....

 

[std_match]

Here is more information about the implementation, but not the verification:

https://www.xilinx.com/support/documentation/application_notes/xapp052.pdf

It is not realistic to directly verify the sequence length in a simulator.
I don't know the best method to do it.