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The KSZ8851SNL-Eval Evaluation Board is intended to provide a convenient and fast way to evaluate or demonstrate the functionality and performance of this new Single-Port Ethernet Controller KSZ8851SNL device from Micrel. The KSZ8851SNL comes with a 32-pin, lead-free QFN (5mm x 5mm) package and provides an ideal solution for applications requiring Serial Peripheral Interface (SPI) between single-port Ethernet Controller and Host microcontroller. This evaluation board is designed as a stand alone without microcontroller on board. By default the KSZ8851SNL-Eval board comes with an operation of no EEPROM for KSZ8851SNL device. Customer can directly wire the board for SPI interface. The purpose is to provide a simple tool that can be used to evaluate the KSZ8851SNL device by connecting via headers to customer provided Microcontroller or Non-PCI hardware platform. Micrel provides a basic software driver based on SPI Interface solution and different operating system platforms to evaluate the KSZ8851SNL functionality and performance. The software includes a configuration utility to allow quick and easy device setup, initialization and transmit/receive packet. All KSZ8851SNL configuration pins, control signals and SPI interface are accessible either by jumpers, test points or headers.