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Visitor
6,700 Views
Registered: ‎05-19-2013

## Power of a sequence of bits (LFSR)

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.

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Visitor
10,478 Views
Registered: ‎05-19-2013

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.

4 Replies
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Scholar
6,691 Views
Registered: ‎02-27-2008

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.

Austin Lesea
Principal Engineer
Xilinx San Jose
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Visitor
6,685 Views
Registered: ‎05-19-2013
Thanks for your reply Austin. This tool could help me with my design.
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Visitor
10,479 Views
Registered: ‎05-19-2013

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.

Highlighted
Historian
6,631 Views
Registered: ‎02-25-2008

@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.