ARM Microcontroller

An Arm processor is one of a family of central processing units (CPUs) based on the reduced instruction set computer (RISC) architecture for computer processors. Arm Limited, the company behind the Arm processor, designs the core CPU components and licenses the intellectual property to partner organizations, which then build Arm-based chips according to their own requirements. Arm Limited does not manufacture or sell any chips directly.

Acorn Computers first developed the Arm processor in the 1980s. Until recently, the name Arm was treated as an acronym, ARM, which at first stood for Acorn RISC Machine and then for Advanced RISC Machine. The acronym is still widely used, although Arm Limited uses only Arm when describing its processor technology.