Easy-I/O is a free IP core software for low-cost FPGA chips, which allows SERCOS III to be easily integrated into basic I/O slave devices with minimal development and integration effort. A free version of the core is provided for the Xilinx Spartan-3 XC3S250E device in a TQ144 housing. It supports 16 digital inputs and 16 digital outputs. 

The Xilinx FPGA is available from Xilinx distributors. Easy-I/O can be downloaded from http://www.ig.sercos.de/easy-io/intro.htm. 

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