ARM Cortex-A12

ARM Cortex-A12

Designed by	ARM Holdings
Microarchitecture	ARMv7-A
Cores	1–4
L1 cache	32-64 KiB I, 32 KiB D
L2 cache	256 KiB–8 MiB (configurable with L2 cache controller)

The ARM Cortex-A12 is a 32-bit processor core licensed by ARM Holdings implementing the ARMv7-A architecture. It provides up to 4 cache-coherent cores. The Cortex-A12 is a successor to the Cortex-A9.

ARM renamed A12 as a variant of Cortex-A17 since the second revision of the core in early 2014, because they were indistinguishable in performance.

Overview

Main article: Comparison of ARMv7-A cores

ARM claims that the Cortex-A12 core is 40 percent more powerful than the Cortex-A9 core. New features not found in the Cortex-A9 include hardware virtualization and 40-bit Large Physical Address Extensions (LPAE) addressing. It was announced as supporting big.LITTLE, however shortly afterwards the ARM Cortex-A17 was announced as the upgraded version with that capability.

Key features of the Cortex-A12 core are:

• Out-of-order speculative issue superscalar execution pipeline giving 3.00 DMIPS/MHz/core.
• NEON SIMD instruction set extension.
• High performance VFPv4 floating point unit.
• Thumb-2 instruction set encoding reduces the size of programs with little impact on performance.
• TrustZone security extensions.
• L2 cache controller (0-8 MB).
• Multi-core processing.
• 40-bit Large Physical Address Extensions (LPAE) addressing up to 1 TB of RAM.
• Hardware virtualization support.

See also

• ARM architecture
• List of ARM cores
• List of applications of ARM cores
• Comparison of ARMv8-A cores
• JTAG

External links

ARM Holdings

• Official website