ARM

Inside Apple’s A7: dual-core CPU, quad-core GPU, Secure Enclave has 3MB SRAM

Following their initial analysis of the iPhone 5s’s innards, silicon experts at Chipworks have now taken a closer look at the handset’s 64-bit A7 processor to reveal a number of interesting tidbits in their initial low-level chip analysis. Based on transistor-level images of the Apple-designed, Samsung-built package, Chipworks was able to determine that the A7 consists of a dual-core processing core and quad-core graphics, tentatively identified as the four cluster version of Imagination Technologies’s PowerVR Series 6, the G6430.

Apple, along with Intel, is of course an investor with a ten percent stake in Imagination Technologies, the UK-based fabless semiconductor maker. Chipworks also focused on a portion of the A7 chip called Secure Enclave where Apple says fingerprint profile is stored securely and walled off from the entire system, except the Touch ID circuitry…