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In the microcomputer control system, there are two commonly used display force methods: one is dynamic display and the other is static display.

(1) Dynamic display

Dynamic display means that the microcomputer regularly scans the display device. In this method, the display devices work in time-sharing, and only one device can be displayed at a time. However, due to the persistence of human vision, as long as the scanning frequency is fast enough, it will still feel that all devices are displayed. For example, many MCU development systems and 6-bit displays on emulators use this display method. The advantage of this kind of display is that it uses less hardware, so the price is low and the wiring is simple. But it takes up a long time, as long as the microcomputer does not execute the display program, the display will be stopped immediately. It can be seen that this kind of display will increase the cost of the computer, so it is less used in the control system mainly based on industrial control.

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