Apple A4

The Apple A4 is a microprocessor designed by Apple and manufactured by Samsung and first used in the iPad tablet computer, then in the iPhone 4 smartphone. It was also used in the iPod Touch (4th generation).
History.
Apple announced the A4 on January 27, 2010, during their "Latest Creation" event.
On June 7, 2010, Steve Jobs publicly confirmed that the iPhone 4 would contain the A4 Processor, which is underclocked from 1.0 GHz to 800 MHz..