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Originally posted by Planet-Ed
Not entirely true .. The Axim uses only a 100mhz bus speed no matter which processor they put in it ... I've yet to see any FACTS of any significant speed improvents between an Axim with a 250 and an Axim with a 255 processor.
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You might want to rethink that. The xScale processor has two separate busses and I think that's where people are getting confused. One is a 100MHz bus that goes out to the memory and the I/O (CF, SD) while there's a 200 MHz Internal bus that's inside the processor.
Here's the info on Intel's site:
http://www.intel.com/design/pca/prodbref/252780.htm
From the table on the page:
"Faster internal system bus (At 400 MHz core, internal bus runs at 200 MHz vs. 100 MHz on the Intel® PXA250 processor"
More:
" For advanced devices that run the most impactful mobile applications, the Intel® PXA255 Processor is the answer. A pin-for-pin compatible, drop-in replacement for the Intel® PXA250 processor, the Intel PXA255 processor is a highly integrated, 32-bit RISC processor that combines the efficiency of Intel design with the ARM v.5TE instruction set architecture. The Intel PXA255 processor delivers industry leading processing power with built-in multimedia capabilities for high performance and hand-held functionality. This enables increased end-user functionality, helps enhance battery life and provides a rich handheld Internet experience. Based on the Intel XScale technology with a new, [B}fast 200Mhz internal system bus[/B], the Intel PXA255 processor cost-effectively boosts processing speed and power management over the Intel PXA250 processor. Power management features enable lower power dissipation; up to 60 percent less than previous Intel XScale technology based products. And the processing capabilities of the Intel PXA255 processor enable portable devices to respond fast to optimized operating systems and performance intensive applications like MPEG4 video decode speech and handwriting recognition, and Java interpretation. From surfing animated websites to streaming video to mixing MP3s, the Intel PXA255 processor delivers processing power for leading performance. "
The 100MHz bus:
"Integrated Memory and PCMCIA/Compact Flash Controller
with 100 MHz Memory Bus, 16-bit or 32-bit ROM/Flash/SRAM (six banks), 16-bit or 32-bit SDRAM, SMROM (four banks), as well as PCMCIA and Compact Flash for added functionality and expandability"
Doesn't matter what's on the motherboard ... the bus is internal to the proc as shown in the diagram.
Super