Virtex5 XC5VFX70T

[Database Administrator]

Hi,

I just got an XC5VFX70T-FF1136 here on my desk, planning to put it on my
self-designed board. I am just wondering what max. speed I can expect for my
internal logic. The speed grade is -1 and I need to design logic running up
to 582 MHz. Should I rather buy a speed grade -2 to be on the safe side or
isn't that an issue?

Regards Saul

[Database Administrator]

On 13 Nov, 11:35, "Saul Bernstein" wrote:
> Hi,
>
> I just got an XC5VFX70T-FF1136 here on my desk, planning to put it on my
> self-designed board. I am just wondering what max. speed I can expect for my
> internal logic. The speed grade is -1 and I need to design logic running up
> to 582 MHz. Should I rather buy a speed grade -2 to be on the safe side or
> isn't that an issue?

What is your internal logic?

Jon

[Database Administrator]

On 13 Nov, 11:35, "Saul Bernstein" wrote:
> Hi,
>
> I just got an XC5VFX70T-FF1136 here on my desk, planning to put it on my
> self-designed board. I am just wondering what max. speed I can expect for my
> internal logic. The speed grade is -1 and I need to design logic running up
> to 582 MHz. Should I rather buy a speed grade -2 to be on the safe side or
> isn't that an issue?

What is your internal logic?

Jon

[Database Administrator]

"Jon Beniston" wrote:
>
> What is your internal logic?
>

It is not as simple as it may seem to describe the internal structure and
operation of the internal logic. There are many different ways to implement
the logical functions and these surely contribute to the max. frequency. But
in the end it is all about some simple control loops and simple image
processing algorithms. Nothing complicated.

[Database Administrator]

"Jon Beniston" wrote:
>
> What is your internal logic?
>

It is not as simple as it may seem to describe the internal structure and
operation of the internal logic. There are many different ways to implement
the logical functions and these surely contribute to the max. frequency. But
in the end it is all about some simple control loops and simple image
processing algorithms. Nothing complicated.

[Database Administrator]

Saul Bernstein wrote:

> I just got an XC5VFX70T-FF1136 here on my desk, planning to put it on my
> self-designed board. I am just wondering what max. speed I can expect for my
> internal logic. The speed grade is -1 and I need to design logic running up
> to 582 MHz. Should I rather buy a speed grade -2 to be on the safe side or
> isn't that an issue?

Enter the critical logic and run static timing.
That will give you Fmax.
Can't afford many lut delays
between flops at that speed.
May have to trade latency for Fmax.

-- Mike Treseler

[Database Administrator]

Saul Bernstein wrote:

> I just got an XC5VFX70T-FF1136 here on my desk, planning to put it on my
> self-designed board. I am just wondering what max. speed I can expect for my
> internal logic. The speed grade is -1 and I need to design logic running up
> to 582 MHz. Should I rather buy a speed grade -2 to be on the safe side or
> isn't that an issue?

Enter the critical logic and run static timing.
That will give you Fmax.
Can't afford many lut delays
between flops at that speed.
May have to trade latency for Fmax.

-- Mike Treseler