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This information has been rolled into other pages. Please look to InterfacingWithHardware for adding useful datasheets. hirzel November 05, 2007, at 10:11 PM

Datasheets

Interesting datasheets for Arduino hackers

ATMega168

Summary datasheet pdf, 33 pages.
Complete datasheet pdf, 374 pages.

MaxStream's XBee ZigBee RF Module

Product Manual (ZigBee) pdf, 46 pages.