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juanzemanate

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08-20-2013 08:08 AM

6,602 Views

Registered:
05-19-2013

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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juanzemanate

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08-20-2013 08:56 AM

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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

austin

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08-20-2013 08:22 AM

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Registered:
02-27-2008

Re: Power of a sequence of bits (LFSR)

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

Principal Engineer

Xilinx San Jose

juanzemanate

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08-20-2013 08:34 AM

6,587 Views

Registered:
05-19-2013

Re: Power of a sequence of bits (LFSR)

Thanks for your reply Austin. This tool could help me with my design.

juanzemanate

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08-20-2013 08:56 AM

10,381 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.

bassman59

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08-21-2013 02:14 PM

6,533 Views

Registered:
02-25-2008

Re: Power of a sequence of bits (LFSR)

@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.