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OpenNAS is an open-source VHDL-based Neuromorphic Auditory Sensor (NAS) code generator capable of automatically generating the necessary files to create a VHDL project for FPGA. OpenNAS guides designers with a friendly interface and allows NAS specification using a five-step wizard for later code generation. It includes several audio input interfaces (AC'97 audio codec, I2S ADC and PDM microphones), different processing architectures (cascade and parallel filter banks), and a set of neuromorphic output interfaces (parallel AER and Spinnaker). After NAS generation, designers have everything prepared for building and synthesizing the VHDL project for a target FPGA using the manufacturer's tools.
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