What does single-chip computer cap mean?

In single chip microcomputer, we often hear the concept of "cap", which is actually the abbreviation of "capacitor" and is a key electronic component. Capacitors have the function of storing charges, and are usually used in applications such as filtering, decoupling and storing charges. Capacitors are also widely used in single chip microcomputer, such as controlling switching power supply, enhancing signal stability and adjusting oscillation frequency. Therefore, it is very necessary for single chip microcomputer engineers to understand the characteristics and applications of capacitors.

Different microcontrollers and different applications have different requirements for cap. Generally speaking, the capacitors used by single chip microcomputer are fixed capacitors, including polar capacitors and nonpolar capacitors. Polar capacitor, also known as electrolytic capacitor, is widely used in cold light source power supply, elevator switch, audio and so on. Non-polar capacitors are widely used in filtering, voltage stabilization, decoupling and other applications. In addition, there is a variable capacitor, which can be used as an oscillator, such as an RF signal oscillator and an amplifier.

In the design and development of single chip microcomputer, the selection and layout of cap also need special attention. Usually we need to consider some factors, such as capacitance size, capacitance polarity, capacitance accuracy, capacitance withstand voltage and so on. In addition, some common principles should be followed, such as placing large capacitors between power supplies, separating fixed capacitors from filter capacitors, and keeping inductors away from circuit boards. These principles help to ensure the stability and reliability of the circuit, reduce the interference of signal noise, and improve the performance and efficiency of the single chip microcomputer.