dynamic scan display interface dynamic scan showed microcontroller interface is the most widely used form of a show. Its interface circuitry is all displays eight strokes of a-h-the same name together. each one very public display of COM is subject to separate I/O line control. CPU output to the field I send font code, displays all receive the same font code, But is that displays bright, depends on the COM side, and by the end of the I/O control. So, we can decide when to indicate which one had. The so-called dynamic scanning means we use the time-sharing method, in turn control all display-COM, so all lit display rotation.

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