ARM Cortex-A55
The ARM Cortex-A55 is a microarchitecture implementing the ARMv8.2-A 64-bit instruction set designed by ARM Holdings' Cambridge design centre. The Cortex-A55 is a 2-wide decode in-order superscalar pipeline.Design
The Cortex-A55 serves as the successor of the ARM Cortex-A53, designed to improve performance and energy efficiency over the A53. ARM has stated the A55 should have 15% improved power efficiency and 18% increased performance relative to the A53. Memory access and branch prediction are also improved relative to the A53.
The Cortex-A75 and Cortex-A55 cores are the first products to support ARM's DynamIQ technology. The successor to big.LITTLE, this technology is designed to be more flexible and scalable when designing multi-core products.Licensing
The Cortex-A55 is available as SIP core to licensees, and its design makes it suitable for integration with other SIP cores into one die constituting a system on a chip.
ARM has also collaborated with Qualcomm for a semi-custom version of the Cortex-A55, used within the Kryo 385 CPU core. This semi-custom core is also used in some Qualcomm's mid-range SoCs as Kryo 360 Silver and Kryo 460 Silver.
