This thesis investigates the development and analysis of an Ethernet driver tailored for the S32K344 microcontroller, targeting automotive Ethernet applications. With the automotive industry's shift towards more connected and autonomous vehicles, the need for reliable, high-speed communication systems within vehicles has become increasingly critical. This research aims to fill a gap in current research by providing a detailed examination of the Ethernet protocol's implementation on the S32K344 microcontroller and developing a driver that meets the strict requirements of automotive networks. The methodology adopted in this study involves a combination of theoretical analysis and practical development work. Initially, the Ethernet protocol, as applied to the S32K344, was thoroughly analyzed to understand its capabilities and limitations within automotive applications.