Olimex: Arm9 boards?

Olimex, if you’re around:

On the olimex web site, in the section for the [Cirrus EP93XX boards, you mention that “PCB design and routing is more complex due to the higher frequencies”. Can you give an example of what kind of challenges you encountered? Is there a CL application note that describes these complexities? I’m thinking of encorporating an ARM9 chip in my next design, and the EP9315 looks pretty nice. How are these higher-frequency, lower-power chips different / more challenging than your average LPC?](http://olimex.com/dev/ep9000.html)

EP9315 have 100 Mhz external bus, at these frequencies you have to match the impedances of the tracks on the external bus

Tsvetan