Chipworks has posted a floorplan of the A5 showing the main IP blocks.
@notnotme: Apple did buy PA Semi apparently to gain microprocessor design expertise, but analysts have concluded Apple did NOT use its PowerPC based design. Instead they concluded Apple used a a Samsung Hummingbird core based on an ARM Cortex A8 core. See http://www.eetimes.com/electronics-news/4200451/Apple-s-A4-dissected-discussed--and-tantalizing
Blog Make a Frequency Plan Tom Burke 17 comments When designing a printed circuit board, you should develop a frequency plan, something that can be easily overlooked. A frequency plan should be one of your first steps ...