The Cortex-A55 is a processor core designed by ARM Holdings that focuses on energy efficiency and performance. It is part of the ARMv8.2-A architecture and is often used in mobile devices, embedded systems, and other applications where power consumption is critical. The Cortex-A55 supports advanced features like big.LITTLE technology, allowing it to work alongside more powerful cores for optimized performance. This processor core is built on a 14nm or smaller manufacturing process, which helps reduce power usage while maintaining high performance. The Cortex-A55 can handle a variety of tasks, making it suitable for applications ranging from smartphones to smart home devices. Its design emphasizes a balance between speed and energy efficiency.