DM8148 power estimation

Stephen,

A similar power estimation spreadsheet is being developed for the DM8148 and it is expected to be made available in October.  The power depends on the specific use-case, but typical power for the DM8148 could be in the 2-3W range.

Regards,
Marc

It's October. Just. Any better ETA on this?   We had been targetting a design for AM3894 but the prospect of more than halving our power usage by changing to AM3874 is very appealing!

Hello,

It's still a work in progress, but probably end of the month.

Regards,
Marc

On a related topic - has anyone measured the power consumption for the various demo applications included with the TMDXEVM8148 kit? Please share if you have.

Thanks,

Kevin

Marc,

Is the power estimation sheet available now? One of my customers need that.

Thanks.

Hello,

It is in review now and should be released late next week.

Regards,
Marc

I am also interesting in this topic. I want to know does it need a fan like DM816x EVM board? or does the DM8148 EVM board have a fan for CPU?

I have both DM816x and DM814x board here - the DM814x has no heatsink and no fan.  The package does not even get as hot as an old Beagleboard.  However, the sample is only running at 600Mhz for no reason that TI will explain.

Concerning the 600MHz A8 clock:

As far as I know, the CPUs are just not yet officially tested for higher speeds than 600MHz. In the u-boot sources you should be able to change some parameters to actually clock the CPU higher.

Marc,

Any update on the spreadsheet?

Thanks,

Alex

Hello,

Even we are eagerly waiting for the spreadsheet.

Regards.

Hello,

When will the Excel sheet be available for DM814x ? 

I want to know the power consumption for the DM8148 in the following configuration :

- Industrial temperature grade (-40°/+70°C)   ===> typ. 25°C

- ARM Cortex-A8 running @ max freq. (1 GHz)

- DSP : not used

- DDR3 : 1GByte @ 800 MHz

- SGX530 used for 2D/3D cartography

- 1x SATA port used

- 2x USB 2.0 used @ 480 Mb/s

- 2x Ethernet @ 100M

- 6x UARTs @ 115200

- LCD output : 800*480 @ 60 Hz

Thanks for your answer.

Hello Phillipe,

can you please tell my what changes i have to do in the u-boot and the kernel to get DDR3 running with 800 Mhz and the CPU with 1000 Mhz?

I really thank you (or anyone other)!
Sebastian

Hello Sebastian,

I don't know much about the DDR, there was something written about Modifying U-Boot

in the below wiki page.

http://processors.wiki.ti.com/index.php/TI814x-DDR3-Init-U-Boot

I hope this could be helpful.

Regards,

So, this spreadsheet won't seem to let me change the CPU frequency away from 600Mhz either.  The plot thickens.  There must be a fault with this device which means the EVM and this spreadsheet are locked down to 600Mhz.  Surely.  Say it aint so, TI.  I've been trying to get answers for a long time now.

Hello,

It allows you to change the CPU frequency, but you first need to select a device part number in cell A5 that supports the desired frequency.

Regards,
Marc

Could I query the PCIe section in this spreadsheet.

There are options for PCIe x2, wheras the DM814x only supports x1 as far as we can see - could someone explain this?    We had been targetting x2 with a DM8168 device and were disappointed that the DM814x only has x1.

Hello,

You are correct, the DM8168 supports x2 PCIe lanes and the DM8148 only supports x1 lane.  We will get this changed in the power spreadsheet.

Regards,
Marc