MK20DN64VFM5 is a microcontroller from NXP and a member of the Kinetis family, which is one of the most powerful controllers in the microcontroller world. The Kinetis family is based on the ARM Cortex M4 processor and the MK20DN64VFM5 is no exception. This controller is well suited for a wide range of embedded applications from automotive to industrial and even consumer use. It has great internal peripherals and offers extended memory to allow for efficient code execution.

The MK20DN64VFM5 is a popular choice for many applications, ranging from automotive systems such as engine controllers to data acquisition in industrial settings and running a variety of home appliances. Its advanced features include a wide range of integrated peripherals, including high performance (DMA) controllers, touch sensing, comparators, and PWM, as well as two different I2C interfaces, four different UARTs, and two FlexTimer modules. Additionally, the MK20DN64VFM5 features up to 64KB of flash memory and 16KB of RAM. This makes it suitable for highly complex embedded applications.

In terms of its working principle, the MK20DN64VFM5 uses an interrupt system to handle incoming data and control its internal peripherals. When triggered by an interrupt, the microcontroller can update the hardware peripherals or execute commands from the system. In order to achieve this, the microcontroller uses an extensive timer system, wherein different tasks can be scheduled for execution. Specially designed peripheral drivers help the microcontroller to manage each of the external peripherals and run the system more efficiently. Moreover, the processor also includes various power management features which help it to save power and increase the overall system efficiency.

The MK20DN64VFM5 is a very capable microcontroller, offering features, performance and reliability which are suitable for many applications. It is an ideal choice for a variety of embedded systems, providing efficient and reliable control. Its advanced features such as its interrupt system, extensible memory, and wide range of peripherals make it a great choice for developers looking to build highly complex embedded applications.