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The ARM company has this homepage: http://www.arm.com where you can search and find documentation (application notes, datasheets) and other support downloads.
At this particular moment i'm unable to send you my own stuff.
PS: ARM implementations vary by company (Intel --> StrongArm (in PDAs)) etc.
Glad if i were of any help
ARM9 could be a good joice too but its not available so openly like 7. The problem with this is that the prices are still very high.
Even the A@L?T*E@R?A solution is very very expensive with the ARM chip.
I studding the use of ARM processor for middle application, at affordable prices. Keen (a user of forum) talk about Samsung S3F441FX ARM7TDMI compatible (h**p://www.samsungelectronics.com/semiconductors/search/datasheet.jsp?family=399) I found for sales of 1 piece: 7 EUR/USD (Not so much, it's the same price of a 16F877, or similar and for capabilities no comments).
My problem now it's to found development tools and programming(hex download) tools for that device, some one have more experience with that device (or other similar, either in price and functionality’s)??
Your information about samsung device is very interesting. However you may find ARM is not as efficient as PIC in memory usage. You could try running it in thumb mode which makes it a bit more efficient.