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Visitor juanzemanate
Visitor
6,602 Views
Registered: ‎05-19-2013

Power of a sequence of bits (LFSR)

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Hi people.

 

I want to implement the LFSR block of System Generator on a FPGA (SPARTAN 6) in order to generate a sequence of binary numbers. So I'd like to know what voltage or power I can get for each bit.

 

Thank you in advance.

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Visitor juanzemanate
Visitor
10,380 Views
Registered: ‎05-19-2013

Re: Power of a sequence of bits (LFSR)

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Austin,

 

I meant to the Internal voltage to the device, and you given me the answer, the bits of the LFSR will work with Vccint=1.2 V or 0 Volts, in my case (Spartan 6 XC6SLX16).

 

Thank you.

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Scholar austin
Scholar
6,593 Views
Registered: ‎02-27-2008

Re: Power of a sequence of bits (LFSR)

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j,

 

Voltage? Power?  I do not understand the question.  Internal to the device, all voltages are the Vccint voltage, or 0 volts (1 or 0 logically).  To estimate power, use the Xlinx Power Estimator (XPE).  Estimating power of small elements will lead to such small numbers that it will be very hard to even see the power.  Best power estimation is performed ont he total design.

 

 

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&sqi=2&ved=0CCoQFjAA&url=http%3A%2F%2Fwww.xilinx.com%2Fproducts%2Fdesign_tools%2Flogic_design%2Fxpe.htm&ei=lYkTUojdDqT2iwLj74H4DQ&usg=AFQjCNEp-HoiA4mXalRA4cmUcdnfCmxqsQ&bvm=bv.5095...

 

Austin Lesea
Principal Engineer
Xilinx San Jose
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Visitor juanzemanate
Visitor
6,587 Views
Registered: ‎05-19-2013

Re: Power of a sequence of bits (LFSR)

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Thanks for your reply Austin. This tool could help me with my design.
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Visitor juanzemanate
Visitor
10,381 Views
Registered: ‎05-19-2013

Re: Power of a sequence of bits (LFSR)

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Austin,

 

I meant to the Internal voltage to the device, and you given me the answer, the bits of the LFSR will work with Vccint=1.2 V or 0 Volts, in my case (Spartan 6 XC6SLX16).

 

Thank you.

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Historian
Historian
6,533 Views
Registered: ‎02-25-2008

Re: Power of a sequence of bits (LFSR)

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@juanzemanate wrote:

 

I meant to the Internal voltage to the device, and you given me the answer, the bits of the LFSR will work with Vccint=1.2 V or 0 Volts, in my case (Spartan 6 XC6SLX16).


inside the FPGA, the exact voltages which represent logic levels are irrelevant. As long as the core supply is correct, you get the logic you expect.

----------------------------Yes, I do this for a living.
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