动态扫描显示接口



动态扫描显示接口是单片机中应用最为广泛的一种显示方式之一。其接口电路是把所有显示器的8个笔划段a-h同名端连在一起，而每一个显示器的公共极COM是各自独立地受I/O线控制。CPU向字段输出口送出字形码时，所有显示器接收到相同的字形码，但究竟是那个显示器亮，则取决于COM端，而这一端是由I/O控制的，所以我们就可以自行决定何时显示哪一位了。而所谓动态扫描就是指我们采用分时的方法，轮流控制各个显示器的COM端，使各个显示器轮流点亮。-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.