The ARM Cortex-A8 is a 32-bit processor core licensed by ARM Holdings implementing the ARMv7-A architecture.
Compared to the ARM11, the Cortex-A8 is a dual-issue superscalar design, achieving roughly twice the instructions per cycle. The Cortex-A8 was the first Cortex design to be adopted on a large scale in consumer devices.
Features
Main article: Comparison of ARMv7-A cores
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 2
- 13-stage integer pipeline and 10-stage NEON pipeline 3
- 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 4
- Rockchip RK2918, RK2906 5
- Samsung Exynos 3110
- TI OMAP3
- TI Sitara ARM Processors
- Conexant CX92755 6
See also
- Electronics portal
- ARM architecture
- Comparison of ARMv7-A cores
- JTAG
- List of applications of ARM cores
- List of ARM cores
External links
ARM HoldingsReferences
Gupta, Rahul (April 26, 2013). "ARM Cortex: The force that drives mobile devices". The Mobile Indian. Retrieved 2023-07-30. https://www.themobileindian.com/news/arm-cortex-the-force-that-drives-mobile-devices-7980 ↩
Cortex-A8 Specification Summary; ARM Holdings. http://arm.com/products/processors/cortex-a/cortex-a8.php?tab=Specifications ↩
Williamson, David, ARM Cortex A8: A High Performance Processor for Low Power Applications (PDF), archived from the original (PDF) on 2015-01-01 https://web.archive.org/web/20150101062932/http://www.arm.com/files/pdf/A8_Paper.pdf ↩
"i.MX51 Applications Processor and Linux Hands on" (PDF). Archived from the original (PDF) on 2011-11-19. Retrieved 2011-10-20. https://web.archive.org/web/20111119202439/http://www.freescale.com/files/training/doc/APF_CON_T0805_i.MX515.pdf ↩
"RK29XX". Archived from the original on 2011-11-05. https://web.archive.org/web/20111105004637/http://www.rock-chips.com/index.php?do=prodnew ↩
"CX97255" (PDF). Archived from the original (PDF) on 2012-11-19. https://web.archive.org/web/20121119093431/http://www.conexant.com/servlets/DownloadNewsServlet/03282011-1.pdf ↩