SAN JOSE, Calif. -- The A7 SoC in Apple's iPhone 5s appears to have a quad-core GPU cluster using Imagination Technologies PowerVR Series 6. It also looks to sport a whopping 3 Mbyte block of SRAM that, in part, could be storage for its fingerprint sensor.
Those were early conclusions of a first peek into the device by Chipworks, following its teardown of the iPhone 5s last week. The company published a full system teardown on its Web site and plans to do further analysis of the A7.
Among other conclusions, Chipworks said the USB, LCD, and camera interfaces in the A7 are the same as ones it has seen in the A5, A6, and A6X. Reuse of such blocks makes sense in a mobile SoC.
The nature of the CPU and the fingerprint sensor are less clear at this stage of the analysis. Chipworks cautions its initial conclusions are in some ways best guesses and it still needs to do circuit extraction to confirm them.
See the following pages for images comparing the A7 and the prior A6.