In a conventional way for Hardware implementation of neural networks (including SOM), we should transform a biological neuron model into logic-circuit structure and then circuit compiler translates the hardware description into an actual circuit which is built in FPGA. In recent years, circuit compilers can synthesize target logic circuits from a description of the processing algorithm immediately. This method is called "High-level Synthesis (HLS)" and it is used for hardware implementation of

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... eep neural networks such as CNN. In this paper, we present a practical example of the implementation of the SOM learning algorithm by using HLS method.