The subject of much speculation has been whether Apple had chosen a new chip manufacturer at the expense of Samsung for its processor in the iPhone 4S, but recent analysis confirms that the dual-core A5 CPU is indeed from the Korean manufacturer.
According to tests conducted by Chipworks, a firm specialising in reverse engineering and patent infringement analysis, Samsung was chosen by Apple for its iPhone 4S dual-core processor despite the raging legal battles over patent infringement, and not rival TSMC as had been rumoured.
As Jim Morrison, product manager of Chipworks revealed to Cnet, the A5 chip manufactured by Samsung "is a 45-nanometer dual-core part, virtually the same as the chip used in the iPad 2". Moreover, iFixit editors found out that "The Apple-branded A5 is a system-on-a-chip (SoC) that includes the main processor, graphics silicon, and system memory (RAM). In fact, the RAM is also made by Samsung".
For the future Apple SoCs the candidate manufacturers are lining up. Taiwan Semiconductor Manufacturing Company is rumored to be getting a contract sooner than everyone had expected, maybe by the end of this year.
Samsung, more foe than partner, could be in pole position to get the contract for the A6 quad-core processor as they have been reliable up till now and switching is not without risk.
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