Dsp-speed of the XM?

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1

Hi folks.

So the Beagleboard XM is around the corner, but I haven't found any
low-level documentation for it yet. The official product page just
mentions that the ARM now runs at 1Ghz.

I wonder what chip the XM is based upon..

The most important things I'd like to know is if it has a DSP like the
OMAP3530 and at which clock-rate it runs.

Cheers,
    Nils

2

Nils Pipenbrinck <np@planetarc.de> writes:

Hi folks.

So the Beagleboard XM is around the corner, but I haven't found any
low-level documentation for it yet. The official product page just
mentions that the ARM now runs at 1Ghz.

I wonder what chip the XM is based upon..

The most important things I'd like to know is if it has a DSP like the
OMAP3530 and at which clock-rate it runs.

It uses a DM3730, which has all the same components as the OMAP3530,
including the DSP. The top clock frequency of the DSP has yet to be
determined. Hopefully it will be 800MHz.

3

Hi Nils,

I wonder what chip the XM is based upon..

DM3730 (DM/TRM not officially public/available yet)

The most important things I'd like to know is if it has a DSP like the
OMAP3530 and at which clock-rate it runs.

It does, but you are AFAIK unfortunately still stuck at the same frequency
(430/520MHz) as with the current Beagles

Best regards
  Søren

4

Hi Mans,

It uses a DM3730, which has all the same components as the OMAP3530,
including the DSP. The top clock frequency of the DSP has yet to be
determined. Hopefully it will be 800MHz.

Agree, but I think latest official statement is equal to OMAP3530 - Isn't
it?
  Søren

5

Søren Steen Christensen <lists@ssc-solutions.dk> writes:

Hi Mans,

It uses a DM3730, which has all the same components as the OMAP3530,
including the DSP. The top clock frequency of the DSP has yet to be
determined. Hopefully it will be 800MHz.

Agree, but I think latest official statement is equal to OMAP3530 -
Isn't it?

IIRC someone said 600MHz would certainly be possible. Koen has had it
running at 800MHz. The question is whether the chips consistently are
capable of this.

6

From the 2.6.32 kernel running on my beagle:

root@beagleboard-xM:~# dmesg | grep -i iva
[ 0.000000] OMAP3630/DM3730 ES1.0 (l2cache iva sgx neon isp 192mhz_clk )
[ 15.736999] IVA2 clocking rate: 800 MHz

No how idea how much that is worth, but the .32 kernel update the TI PSP team just released has it at 800MHz and the .34 based branch seems to have the same.

regards,

Koen

7

> It uses a DM3730, which has all the same components as the OMAP3530,
> including the DSP. The top clock frequency of the DSP has yet to be
> determined. Hopefully it will be 800MHz.

root@beagleboard-xM:~# dmesg | grep -i iva
[ 0.000000] OMAP3630/DM3730 ES1.0 (l2cache iva sgx neon isp
192mhz_clk )
[ 15.736999] IVA2 clocking rate: 800 MHz
No how idea how much that is worth, but the .32 kernel update the TI
PSP team just released has it at 800MHz and the .34 based branch seems
to have the same.

Seems to be good really news, although I fear that 800 MHz will be pushing
the limit as high as it gets...
I would had guessed somewhere around 700MHz-750MHz to be maximum...

Regards,
  Søren

8

I had the IVA running at 1GHz on one xM by increasing the core voltage a lot. Worked pretty good, but I bet the lifetime of the omap decreases dramatically. And I suspect it voids the warranty, kills kittens, etc, etc.

regards,

Koen

9

Currently there is talk about binning the parts to get the DSP to around 800MHz. The parts that will be used on the -xM have not been binned. And yes, there are lifetime implications as well as current implication when running it at 800Mhz or even overclocking it at 1GHz. If you do smoke it doing that, then of course you will be responsible for eating it. Most likely we will spec the DSP at the lower frequency for the -xM.

Gerald