What does the minimum system of a microcontroller include?

The minimum system of a microcontroller includes: 1. Power supply; 2. Crystal oscillator circuit; 3. Reset circuit; The minimum system is also the minimum application system, which refers to a system that can work with a microcontroller composed of the fewest components.

The minimum system of a single-chip microcomputer is also the minimum application system. It refers to a system that can work with a single-chip computer composed of the fewest components. So what does the minimum system of this single-chip computer include? ? The most common 51 microcontroller includes the following three parts:

1. Power supply: 1 5V DC power supply

2. Crystal oscillator circuit: The typical crystal oscillator is 11.0592MHz (because it can accurately It can obtain 9600 baud rate and 19200 baud rate for occasions with serial communication)/12MHz (generating accurate uS-level time intervals to facilitate timing operations).

3. Reset circuit: It is composed of a capacitor connected in series with a resistor. From the figure and the property that "the capacitor voltage cannot mutate", we can know that when the system is powered on, the RST pin will appear at a high level, and, The duration of this high level is determined by the RC value of the circuit. Capacitors generally use 10~30uF.

After these three parts are built, the microcontroller can be run.

After running, you can use the control port of the microcontroller to control other things.

The above is the detailed content of What does the minimum system of a microcontroller include?. For more information, please follow other related articles on the PHP Chinese website!