Last year, Samsung told the world it had teamed with Instrinsity on a 1GHz ARM chip known as the Hummingbird, and Samsung manufactures the ARM chips underpinning the Apple iPhone, a smaller version of the iPad. This has led many to assume that the Hummingbird architecture is the basis for the the A4.
I am sure that Apple’s ability to act quickly and independently helped win them not just design expertise, but an actual nearly finished CPU in the form of the Hummingbird project. There does now seem to be a smartphone Megahertz War similar to the bad old days of desktop computing when AMD and Intel fought it out 1 gigahertz at a time. We will see what comes of this when the new iPhones come out this Summer. A4 may not translate into a handheld cpu form factor. But looking at the iFixit teardown of the iPad makes me think the iPad motherboard is almost the size of a cell phone! So who knows, maybe A4 is scalable down to iPhone as well. We’ll find out in June I’m sure when Apple hosts its Worldwide Developers Conference (WWDC) in San Francisco, CA.