Hi all,
I’m working on designing a board to tinker with the AT91RM9200 ARM processor (it looks like this ARM can use external memory with a 2-layer board).
The datasheet gives a number of dimensions, but not exactly a recommended footprint. The device is a PQFP 208, 28x28mm, 0.5mm pin spacing. I found the SQFP-S-28X28-208 package in Eagle’s SMD-IPC library, and it looks to be about right. I’m weary to use a standard part from someone elses library for an SMD – but as I can’t seem to find a recommended footprint, I was wondering if anyone had successfully used this eagle footprint before on the ARM without ending up with some coasters…? 
thanks,
silic0re
(P.S. While googling to see if the AT91RM9200 and a Micron MT48LC16M16A2P 32MB SDRAM would work together on a 2-layer board, I actually found a real example of someone using this very same setup! http://www.opencircuits.com/Linuxstamp . It looks like an interesting project, and makes me feel better about using such a fast chip with external memory on a 2-layer board… )