![]() ![]() The Samsung version is called APL0898, which is manufactured on a 14 nm FinFET process and is 96 mm 2 large, while the TSMC version is called APL1022, which is manufactured on a 16 nm FinFET process and is 104.5 mm 2 large. On A9 or later A-series processors, the flash storage subsystem is on an isolated bus that is only granted access to memory containing user data via the DMA crypto engine." Dual sourcing (Chipgate) Īpple A9 chips are fabricated by two companies: Samsung and TSMC. Encryption Īccording to Apple, "Every iOS device has a dedicated AES-256 crypto engine built into the DMA path between the flash storage and main system memory, making file encryption highly efficient. The remaining quarter comes from the microarchitectural tuning and smaller technology node. About a quarter comes from the better memory subsystem (3× bigger caches). Some of the microarchitectural features are as follows:Ībout half of the performance boost over A8 comes from the 1.85 GHz frequency. ![]() The A9's microarchitecture is similar to the second generation Cyclone (used in A8 chip) microarchitecture. This gives the phone a significant storage performance advantage over competitors which often use eMMC or UFS to connect to their flash memory. The iPhone 6s' NAND design is more akin to a PC-class SSD than embedded flash memory common on mobile devices. The A9 features a custom storage solution, which uses an Apple-designed NVMe-based controller that communicates over a PCIe connection. It has decoding support for HEVC, H.264, MPEG‑4, and Motion JPEG. The A9 has video codec encoding support for H.264. In addition to servicing the accelerometer, gyroscope, compass, and barometer, the M9 coprocessor can recognize Siri voice commands. The A9 directly integrates an embedded M9 motion coprocessor, a feature originally introduced with the A7 as a separate chip. The A9 includes a new image processor, a feature originally introduced in the A5 and last updated in the A7, with better temporal and spatial noise reduction as well as improved local tone mapping. The A9 also features a custom PowerVR Series7XT 650 MHz GPU, featuring 6x custom shader cores and compiler from Apple. The A9 has a per-core L1 cache of 64 KB for data and 64 KB for instructions, an L2 cache of 3 MB shared by both CPU cores, and a 4 MB 元 cache that services the entire SoC and acts as a victim cache. The A9 in the iPhone 6S has 2 GB of LPDDR4 RAM included in the package. The A9 features an Apple-designed 64-bit 1.85 GHz ARMv8-A dual-core CPU called Twister. The latest software updates for the iPhone 6S & 6S Plus including the iPhone SE 1st generation variants systems using this chip are iOS 15.7.9, released on Septemas they were discontinued with the release of iOS 16 in 2022, and for the iPad 5th generation using this chip was iPadOS 16.5, released on May 18, 2023, as it was discontinued with the release of iPadOS 17 in 2023. On September 12, 2018, the iPhone 6S and iPhone 6S Plus along with the first-generation iPhone SE was discontinued, ending production of A9 chips. Apple states that it has 70% more CPU performance and 90% more graphics performance compared to its predecessor, the Apple A8. Manufactured for Apple by both TSMC and Samsung, it first appeared in the iPhone 6S and 6S Plus which were introduced on September 9, 2015. The Apple A9 is a 64-bit ARM-based system-on-chip (SoC), designed by Apple Inc.
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