Microcontroller technology is an essential companion to our everyday lives, often unnoticed. Whether it's a mobile phone, household appliance, or car – microcontrollers are an important component. This textbook introduces the fundamentals of microcontroller technology and describes the structure, function, and handling of microcontrollers in a well-founded and detailed manner. The didactic structure of the book allows for a gradual approach to the topic. Readers learn about the components of microcontrollers and their interactions in small steps. Practical examples and applications deepen the knowledge gained and assist in developing and implementing their own microcontroller applications. The MSP430F2274, a very modern and powerful microcontroller, serves as an example for the entire process. This textbook is aimed at students in bachelor's degree programs at universities.