Fastest 640e pin compatible to CS-PPC?

[billt]

Some 604e information (nice chart on page 2):
http://search.freescale.com/cs.html?url=http%3A//www.freescale.com/files/32bit/doc/fact_sheet/PPC604EFACT.pdf&qt=powerpc&col=product&n=2

604e "user manual" (engineering heave stuff):
http://search.freescale.com/cs.html?url=http%3A//www.freescale.com/files/32bit/doc/ref_manual/MPC604EUM.pdf&qt=604e&col=product&n=7

Addendum to "user manual":
http://search.freescale.com/cs.html?url=http%3A//www.freescale.com/files/archives/doc/ref_manual/MPC604EUMAD.pdf&qt=604e&col=product&n=6

The user manual doesn't seem to talk very much about voltage stuff though.

604e technical summary, has brief discussion about seperating the 2.5V core coltage supply from the 3.3V IO buffer supply:
http://search.freescale.com/cs.html?url=http%3A//www.freescale.com/files/32bit/doc/data_sheet/MPC604E.pdf&qt=604e&col=product&n=10

This may indicate the possibility to change a 2.5V regulator on the CSPPC to a 1.8V regulator for the faster versions. This assumes nothing else onthe board runs off the 2.5V supply, if anything else does then it coule be more problematic. Probe around witha meter to see.


I went to www.freescale.com and did a keyword search for 604e. If you find a couple part numbers for exactly what chips you'd like to use you can search by part number as well and possibly get more detailed docs for that.

But check the voltages used by other things, you might be lucky enough to just have to change a regulator and the PPC chip, as well as probably put a bigger heatsink on and have things go well. But changing the PPC chip is going to be some work, and may be costly... I look forward to hearing if you have any success in this!