S5L8930

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A4.jpg

A system on a chip ("SoC") developed by Apple's in-house chip design department. It is used in iPad, both models of the iPhone 4 (GSM and CDMA), Apple TV 2G and the iPod touch 4G. Publicly, Apple refers to this chip as the A4. Internally, this processor is also based on the S5L8920X family, which can also be seen through the reuse of several MMIO devices and MMIO device registers (i.e: chipid).

Exploits

Bootrom

iBoot

Kernel

Userland

Boot Chain

Bootrom->LLB->iBoot->Kernel->System Software

Specifications

Aside from the iPhone 4's additional RAM and an overall higher clock speed, these are the same specifications as the S5L8920 and S5L8922.

See also

Links