XMOS' xCORE array microphone evaluation kit, XK-USB-MIC-UF216, offers a scalable and flexible hardware and software solution for high-performance and low-cost, multi-channel USB microphone aggregator and array microphones. This evaluation kit is built around the xCORE-200-series of multicore microcontrollers and provides direct interfacing to seven pulse density modulation (PDM) microphones and a high-speed USB 2.0 device.

Each captured PDM input is converted into a PCM audio stream and transferred to the host PC or processor via USB audio class protocol. The system can be configured to generate PCM output at sample rates from 7.35 kHz to 48 kHz, making it simple to interface to a range of hosts.

The microphone interface library is highly configurable and enables designers to customize the functionality of a system to meet specific requirements. It is supplied as source code and accompanied by application notes which show examples of how to modify the code.

Getting started with xCORE-200 is easy, thanks to the xTIMEcomposer™ development tools which provide a feature-rich software development environment with quick and easy customization for customer-specific and product-differentiating features. The xTIMEcomposer tool provides everything needed to write, debug, and test applications for xCORE-200 microcontrollers.