An evolution in the sector of microelectronics took place in the past decades. A lot of features and functions, which were on external chips in the past and also totally new functions, are already integrated into one single chip. The trend goes to one chip computer systems, so called Systems on Chips (SoCs) [4]. This book basically deals with a Cypress Programmable Systems on Chip (PSoC) microcontroller. A PSoC is explained by using a real project that was done for the microelectronic laboratory at the University of Applied Sciences in Wels. The goal of the mentioned project was a system investigation of the PSoC system, the development of a test board (printed circuit board) for it and the creation of example projects for different applications in order to support the students at the laboratory. Through the fact, that most parts of the book are explained by using example projects, it is suitable as well for engineers with technical background as persons who are interested in electronics, microcontrollers, development of a printed circuit board (PCB) for microcontrollers and especially Systems on Chip.