XMOS is a manufacturer of multicore micro-controller devices. xCORE-eXtended Architecture (the XA Family) combines multicore microcontroller technology with an ultra-low-power ARM® Cortex®-M3 processor, to create the next wave in programmable system-on-chip (SoC) products. The xCORE-XA architecture allows embedded system designers to use high-level software to configure a device with the exact set of interfaces and peripherals needed for their design, while re-using existing ARM binary code and standard library functions, and taking advantage of ultra-low energy fixed-function peripherals. Designers can also add real-time data-plane plus control processing and DSP blocks, using multiple xCORE processor cores, with the ARM available to run control plane processing software such as communication protocol stacks, standard graphics libraries, or complex monitoring systems.
You can read more about it here: http://www.xmos.com/de/products/silicon/xa-series
