# ARM Cortex-A

> family of microprocessor cores with ARM microarchitecture

**Wikidata**: [Q2819366](https://www.wikidata.org/wiki/Q2819366)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/ARM_Cortex-A)  
**Source**: https://4ort.xyz/entity/arm-cortex-a

## Summary
ARM Cortex-A is Arm Holdings’ family of licensable microprocessor cores that powers every Android smartphone and most tablets, smart-TVs and Chromebooks. The line splits into “high-performance” and “high-efficiency” sub-families, all implementing the ARM instruction-set and sold only as semiconductor intellectual-property, never as finished chips.

## Key Facts
- Manufacturer: Arm Holdings (no fabrication; IP-licensing model only)
- Architecture lineage: ARMv7-A (32-bit) → ARMv8-A (64-bit)
- Product tiers: high-performance, high-efficiency, ultra-high-efficiency sub-families
- Official portal: https://www.arm.com/products/processors/cortex-a
- Wikidata sitelinks: 8 language editions of Wikipedia
- Stack-Overflow tag: cortex-a
- Commons category: ARM Cortex-A
- Freebase ID: /m/0wyrl_9
- Instance of: model series
- Subclass of: ARM architecture, semiconductor IP core, microprocessor

## FAQs
### Q: What devices use ARM Cortex-A cores?
A: Because Arm only licenses the design, chipmakers such as Qualcomm, Samsung, Apple, MediaTek and Huawei integrate Cortex-A cores into SoCs that run virtually every mainstream Android phone, most tablets, smart-TVs, automotive infotainment and many low-power servers.

### Q: How do Cortex-A, Cortex-R and Cortex-M differ?
A: Cortex-A targets rich operating systems (Linux, Android) with memory-management units; Cortex-R serves hard-real-time safety uses (disk controllers, automotive); Cortex-M focuses on tiny embedded microcontrollers.

### Q: Are Cortex-A cores 32-bit or 64-bit?
A: Early cores (A5, A7, A8, A9) implement the 32-bit ARMv7-A. From Cortex-A53 onward all cores support the 64-bit ARMv8-A while remaining backward-compatible with 32-bit code.

### Q: Can I buy a standalone Cortex-A processor?
A: No. Arm delivers synthesizable RTL, test benches and documentation; licensees integrate the core into their own chips and choose fabrication partners such as TSMC, Samsung or GlobalFoundries.

## Why It Matters
Before Cortex-A, the mobile world relied on custom or off-the-shelf CPUs that either drained batteries quickly or lacked the performance for full web browsers and app stores. By offering a menu of power-optimized, licensable cores, Arm let any semiconductor company build an application processor without the billion-dollar cost of designing a CPU from scratch. The result was an explosion of low-cost, high-performance smartphones that reshaped consumer habits, created the Android ecosystem, and pushed Intel to retreat from handset CPUs. Today the same Cortex-A DNA scales from $5 Raspberry Pi-class boards to 64-core cloud processors, making it the de-facto standard for energy-efficient compute in every price band.

## Notable For
- Dominant CPU in every major smartphone platform outside Apple’s custom cores
- First 64-bit licensable core (Cortex-A53, 2012) accelerated mobile transition to 64-bit
- Big.LITTLE heterogeneous computing pioneered by pairing A7 with A15, now industry norm
- More than 150 billion Arm-based chips shipped (entire Arm family, Cortex-A is largest share)
- Consistent power-efficiency lead over x86 enabled fan-less laptops and cloud servers

## Body
### Product Map
Arm groups Cortex-A into three market slices:
- High-performance: Cortex-A9, A15, A17, A57, A72, A73, A75, A76, A77
- High-efficiency: Cortex-A5, A7, A53, A55
- Ultra-high-efficiency: Cortex-A32, A34, A35

Each core is delivered as synthesizable Verilog or VHDL. Licensees add caches, interconnects, GPUs, NPUs and radios to create an SoC.

### 32-bit Era
Cortex-A8 (2005) introduced the first superscalar, dual-issue pipeline to the family and appeared in iPhone 3GS, BeagleBoard and Palm Pre. Cortex-A9 added multi-core support, powering Samsung Galaxy S II and PlayStation Vita.

### 64-bit Transition
Announced in 2011, ARMv8-A brought 64-bit registers, larger address space and a revamped instruction set. Cortex-A53 (little) and A57 (big) formed the first big.LITTLE pairing in 2012; they shipped in Snapdragon 810, Exynos 5433 and Raspberry Pi 3. Successors A72, A73, A75 refined performance-per-watt, while A76 and A77 pushed laptop-class throughput at smartphone power budgets.

### Licensing Model
Arm offers three license tiers:
1. POP license – optimized physical implementation for a given node
2. Standard core license – RTL plus testbench
3. Architecture license – rights to design custom cores compatible with ARM ISA (Apple, Qualcomm, Nvidia, Microsoft, Fujitsu)

### Ecosystem
Tooling support spans GCC, LLVM, Arm Development Studio, Linaro, Yocto, Android NDK and Windows on Arm. Mainline Linux and BSD kernels treat Cortex-A as a first-class citizen.

## Schema Markup
```json
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  "@type": "Thing",
  "name": "ARM Cortex-A",
  "description": "Family of licensable ARM microprocessor cores optimized for high-performance and high-efficiency applications.",
  "url": "https://www.arm.com/products/processors/cortex-a",
  "sameAs": ["https://www.wikidata.org/wiki/Q1342385", "https://en.wikipedia.org/wiki/ARM_Cortex-A"],
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## References

1. [Source](https://www.arm.com/products/processors/cortex-a)