ARM Cortex-A8
Processor core in computers
From Wikipedia, the free encyclopedia
The ARM Cortex-A8 is a 32-bit processor core licensed by ARM Holdings implementing the ARMv7-A architecture.
Launched2005
Designed byARM Holdings
Common manufacturer
Max. CPU clock rate0.6 GHz to at least 1.0 GHz[1][additional citation(s) needed]
Cortex-A8 is commonly incorporated into SoCs, such as this Freescale i.MX50; the chip is seen on an e-reader's main logic board. | |
| General information | |
|---|---|
| Launched | 2005 |
| Designed by | ARM Holdings |
| Common manufacturer | |
| Performance | |
| Max. CPU clock rate | 0.6 GHz to at least 1.0 GHz[1][additional citation(s) needed] |
| Physical specifications | |
| Cores |
|
| Cache | |
| L1 cache | 32 KiB/32 KiB |
| L2 cache | 512 KiB |
| Architecture and classification | |
| Instruction set | ARMv7-A |
Compared to the ARM11, the Cortex-A8 is a dual-issue superscalar design, and is capable of at most twice the instructions per cycle. The Cortex-A8 was the first Cortex design to be adopted on a large scale in consumer devices.[2]
Features
Key features of the Cortex-A8 core are:
- Frequency from 600 MHz to 1 GHz and above
- Superscalar dual-issue microarchitecture
- NEON SIMD instruction set extension[3]
- 13-stage integer pipeline and 10-stage NEON pipeline[4]
- VFPv3 floating-point unit
- Thumb-2 instruction set encoding
- Jazelle RCT (also known as ThumbEE instruction set)
- Advanced branch prediction unit with >95% accuracy
- Integrated level 2 Cache (0–4 MiB)
- 2.0 DMIPS/MHz
Chips
Several system-on-chips (SoC) have implemented the Cortex-A8 core, including:
- Allwinner A1X
- Apple A4
- Freescale Semiconductor i.MX51[5]
- Rockchip RK2918, RK2906[6]
- Samsung Exynos 3110
- TI OMAP3
- TI Sitara ARM Processors
- Conexant CX92755[7]
