ARM Cortex-A55

Last updated
ARM Cortex-A55
General information
Launched2017
Designed by ARM Holdings
Performance
Max. CPU clock rate 1.25 GHz [1]   to 2.31 GHz [1]  
Cache
L1 cache 32–128  KB (16–64 KB I-cache with parity, 16–64 KB D-cache) per core
L2 cache64–256 KB
L3 cache512 KB – 4 MB
Architecture and classification
ApplicationMobile
Instruction set ARMv8.2-A
Physical specifications
Cores
  • 1–8 per cluster, multiple clusters
Products, models, variants
Product code name(s)
  • Ananke
History
Predecessor(s) ARM Cortex-A53
Successor(s) ARM Cortex-A510

The ARM Cortex-A55 is a central processing unit 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. [2]

Contents

Design

The Cortex-A55 serves as the successor of the ARM Cortex-A53, designed to improve performance and energy efficiency over the A53. [3] 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. [4] [5] 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 (e.g. GPU, display controller, DSP, image processor, etc.) into one die constituting a system on a chip (SoC).

ARM has also collaborated with Qualcomm for a semi-custom version of the Cortex-A55, used within the Kryo 385 CPU core. [6] This semi-custom core is also used in some Qualcomm's mid-range SoCs as Kryo 360 Silver and Kryo 460 Silver.

Usage

Related Research Articles

<span class="mw-page-title-main">Qualcomm Snapdragon</span> Suite of system-on-a-chip (SoC) semiconductor products

Snapdragon is a suite of system on a chip (SoC) semiconductor products for mobile devices designed and marketed by Qualcomm Technologies Inc. The Snapdragon's central processing unit (CPU) uses the ARM architecture. As such, Qualcomm often refers to the Snapdragon as a "mobile platform". Snapdragon semiconductors are embedded in devices of various systems, including vehicles, Android, Windows Phone and netbooks. In addition to the processors, the Snapdragon line includes modems, Wi-Fi chips and mobile charging products.

The ARM Cortex-A is a group of 32-bit and 64-bit RISC ARM processor cores licensed by Arm Holdings. The cores are intended for application use. The group consists of 32-bit only cores: ARM Cortex-A5, ARM Cortex-A7, ARM Cortex-A8, ARM Cortex-A9, ARM Cortex-A12, ARM Cortex-A15, ARM Cortex-A17 MPCore, and ARM Cortex-A32, 32/64-bit mixed operation cores: ARM Cortex-A35, ARM Cortex-A53, ARM Cortex-A55, ARM Cortex-A57, ARM Cortex-A72, ARM Cortex-A73, ARM Cortex-A75, ARM Cortex-A76, ARM Cortex-A77, ARM Cortex-A78, ARM Cortex-A710, and ARM Cortex-A510 Refresh, and 64-bit only cores: ARM Cortex-A34, ARM Cortex-A65, ARM Cortex-A510 (2021), ARM Cortex-A715, ARM Cortex-A520, and ARM Cortex-A720.

Qualcomm Krait is an ARM-based central processing unit included in the Snapdragon S4 and earlier models of Snapdragon 400/600/800 series SoCs. It was introduced in 2012 as a successor to the Scorpion CPU and although it has architectural similarities, Krait is not a Cortex-A15 core, but it was designed in-house. In 2015, Krait was superseded by the 64-bit Kryo architecture, first introduced in Snapdragon 820 SoC.

<span class="mw-page-title-main">ARM big.LITTLE</span> Heterogeneous computing architecture

ARM big.LITTLE is a heterogeneous computing architecture developed by ARM Holdings, coupling relatively battery-saving and slower processor cores (LITTLE) with relatively more powerful and power-hungry ones (big). The intention is to create a multi-core processor that can adjust better to dynamic computing needs and use less power than clock scaling alone. ARM's marketing material promises up to a 75% savings in power usage for some activities. Most commonly, ARM big.LITTLE architectures are used to create a multi-processor system-on-chip (MPSoC).

<span class="mw-page-title-main">ARM Cortex-A53</span> Microarchitecture implementing the ARMv8-A 64-bit instruction set designed by ARM Holdings

The ARM Cortex-A53 is one of the first two central processing units implementing the ARMv8-A 64-bit instruction set designed by ARM Holdings' Cambridge design centre, along with the Cortex-A57. The Cortex-A53 is a 2-wide decode superscalar processor, capable of dual-issuing some instructions. It was announced October 30, 2012 and is marketed by ARM as either a stand-alone, more energy-efficient alternative to the more powerful Cortex-A57 microarchitecture, or to be used alongside a more powerful microarchitecture in a big.LITTLE configuration. It is available as an IP core to licensees, like other ARM intellectual property and processor designs.

This is a comparison of ARM instruction set architecture application processor cores designed by ARM Holdings and 3rd parties. It does not include ARM Cortex-R, ARM Cortex-M, or legacy ARM cores.

Qualcomm Kryo is a series of custom or semi-custom ARM-based CPUs included in the Snapdragon line of SoCs.

The ARM Cortex-A73 is a central processing unit implementing the ARMv8-A 64-bit instruction set designed by ARM Holdings' Sophia design centre. The Cortex-A73 is a 2-wide decode out-of-order superscalar pipeline. The Cortex-A73 serves as the successor of the Cortex-A72, designed to offer 30% greater performance or 30% increased power efficiency.

The ARM Cortex-A75 is a central processing unit implementing the ARMv8.2-A 64-bit instruction set designed by ARM Holdings's Sophia design centre. The Cortex-A75 is a 3-wide decode out-of-order superscalar pipeline. The Cortex-A75 serves as the successor of the Cortex-A73, designed to improve performance by 20% over the A73 in mobile applications while maintaining the same efficiency.

The ARM Cortex-A76 is a central processing unit implementing the ARMv8.2-A 64-bit instruction set designed by ARM Holdings' Austin design centre. ARM states a 25% and 35% increase in integer and floating point performance, respectively, over a Cortex-A75 of the previous generation.

The ARM Cortex-A77 is a central processing unit implementing the ARMv8.2-A 64-bit instruction set designed by ARM Holdings' Austin design centre. ARM announced an increase of 23% and 35% in integer and floating point performance, respectively. Memory bandwidth increased 15% relative to the A76.

The ARM Cortex-A78 is a central processing unit implementing the ARMv8.2-A 64-bit instruction set designed by ARM Ltd.'s Austin centre.

The ARM Cortex-X1 is a central processing unit implementing the ARMv8.2-A 64-bit instruction set designed by ARM Holdings' Austin design centre as part of ARM's Cortex-X Custom (CXC) program.

The ARM Cortex-A710 is the successor to the ARM Cortex-A78, being the First-Generation Armv9 “big” Cortex CPU. It is the companion to the ARM Cortex-A510 "LITTLE" efficiency core. It was designed by ARM Ltd.'s Austin centre. It is the fourth and last iteration of Arm’s Austin core family. It forms part of Arm's Total Compute Solutions 2021 (TCS21) along with Arm's Cortex-X2, Cortex-A510, Mali-G710 and CoreLink CI-700/NI-700.

The ARM Cortex-A510 is the successor to the ARM Cortex-A55 and the first ARMv9 high efficiency "LITTLE" CPU. It is the companion to the ARM Cortex-A710 "big" core. It is a clean-sheet 64-bit CPU designed by ARM Holdings' Cambridge design team.

The ARM Cortex-X2 is a central processing unit implementing the ARMv9-A 64-bit instruction set designed by ARM Holdings' Austin design centre as part of ARM's Cortex-X Custom (CXC) program.It forms part of Arm's Total Compute Solutions 2021 (TCS21) along with Arm's Cortex-A710, Cortex-A510, Mali-G710 and CoreLink CI-700/NI-700.

The ARM Cortex-A520 is a "little" CPU core model from Arm unveiled in TCS23 it serves as a successor to the CPU core ARM Cortex-A510. The Cortex-A500 CPU cores series generally focus on high efficiency, the CPU core can be paired with the other CPU cores in its family like ARM Cortex-A720 or/and Cortex-X4 in a CPU cluster.

The ARM Cortex-A720 is a CPU core model from Arm unveiled in TCS23, it serves as a successor of the CPU core ARM Cortex-A715, Cortex-A700 CPU cores series generally focus on high performance and efficiency, the CPU core can be paired with other cores in its family like ARM Cortex-X4 or/and ARM Cortex-A520 in a CPU cluster. It can be used as either "big" or "LITTLE".

References

  1. 1 2 Mike Demler (July 3, 2018). SC9863 Is First Cortex-A55 Octa-Core (Report). The Linley Group . Retrieved February 16, 2022.
  2. ↑ "Cortex-A55". Cortex-A55. ARM Holdings. Retrieved 10 July 2017.
  3. ↑ Triggs, Robert (31 May 2017). "A closer look at ARM's new Cortex-A75 and Cortex-A55 CPUs". Android Authority. Retrieved 10 July 2017.
  4. ↑ Humrick, Matt (29 May 2017). "Exploring Dynamiq and ARM's New CPUs". Anandtech. Retrieved 10 July 2017.
  5. ↑ Savov, Vlad (29 May 2017). "ARM's new processors are designed to power the machine-learning machines". The Verge. Retrieved 10 July 2017.
  6. ↑ Frumusanu, Andrei (6 December 2017). "Qualcomm Announces Snapdragon 845 Mobile Platform". Anandtech. Retrieved 7 December 2017.
  7. ↑ Mark van der Zalm. "Intel® Agilex™ D-Series FPGA White Paper". Intel. Retrieved 2022-10-20.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.