[gguruusa]

Originally Posted by tronnixx

You just made me pull my hair out...
It's not off base at all. You may not be able to tell me about the engineering of it, but I can assure you that I can.

So enlighten me. So far, all you've done is spout off about how the xscale can run faster and completely dismissed what effect that might have on the rest of the system. Heck, you've completely dismissed that there IS a rest of the system.

I have worked with the XScale in many embedded systems. It's part of what I do...

good for you. Not relevent to the subject at hand, however, as we both agree that the component itself is designed to run at higher speeds under normal conditions.

The processor in the 6700 is most of the system, hence that is why they call it a System on Chip.

lol - you've got that completely backwards. It's called a SoC because you don't need much more for a base system, not because in a given application there isn't much more. BTW, there is quite a bit more in these devices than just the CPU - you don't even have to open the case to know that.
[quote]But what I am telling you is that it is designed to run safely at up to 624Mhz. Again, it will run warmer but it will not damage it. [quote]Yep. No argument that the PXA270 can do it. Like I said though, there are other parts to the system, and you can't answer the question without factoring their performance in as well.[quote]HTC and many other OEMs choose the XScale (or other SoCs) because they contain most of the system within and therefore it means less engineering and external components.[quote]yep. Lot's of good benefit from using standard, well-known parts.

You cannot compare the XScale to a Intel Pentium, or a car for that matter.

Sure you can, it just depends on how detailed you want to be. Obviously you're not going to use a gas engine as your CPU, but clearly cars and electronics can react poorly when stock parts are run outside of their stock configurations. <--- that's a comparison of an xscale, a pentium, and a car, in case you missed it.

The XScale contains MOST of the internal systems that would be affected by a clock change.

see the word MOST there? Unless it's ALL, you haven't finished your research. And lets not even get into that you're looking at them discretely as well as assuming standard operating conditions.

The only components external to the CPU that would be affected by the speed of the proccessor would be the EEPROM/RAM/ROM chips but it would not damage them because the requirments on the pxa270 for the memory are compatible at 624mhz too.. I did my research

Not enough research, though. There are plenty more systems in the phone external to the PXA270 than memory, and speed isn't the only factor.

Now, indirectly speeding up the clock increases current draw (of course) on other components but the power devices and hardware in the XV6700 can tolerate it. It's quite a well built system.

and there, of course, is the big quesiton: How do you know it? Unless you work for HTC, it's unlikely you have engineering drawings, so what you're really doing is providing a (hopefully educated) guess - which is quite a bit different than fact.

I don't understand how people that don't understand the inner engineering of something can argue with someone who does...

Exactly. A whole company of engineers with *gasp* actual data *gasp* decided to sell it at 400mHz, but they're no match for your powers of deduction. Frankly, your focus on the PXA270 as all you need to look at screams inexperience, at a minimum.

Please, do your research before making such an assumption... If you would like to continue this debate on a technical level go to: http://www.phytec.com/pdf/datasheets/PXA270_DS.pdf (PXA270 Design PDF). In particular, look at Page 14 (The Block Diagram). Most of the systems built in to this processor are those that are on the motherboard in a typical PC. Such as Real-Time Clocks, Serial UARTS, etc.

What'd be the point? There isn't any disagreement that the PXA270 is designed to handle it under normal conditions. The question is whether "normal conditions" are all it's going to see and how the rest of the system is going to fare.

It boils down to this: There is precious little technical info available with which to answer the question, and without knowing WHY the phone is sold everywhere at 400Mhz, it is consequently difficult to answer definitively if running it faster will damage it in a material way.