第三章LED显示及其接口

1、第三章第三章LEDLED显示及其接口显示及其接口 单片机应用系统中，常常需要进行信息显示，用于显示的器件有很多，如CRT、LED、LCD、场致发光器件等。常用的显示器有LED（发光二极管显示器）和LCD（液晶显示器）两种。在纯数值或简单字符显示应用中LED显示器又占有明显的优势。 LED显示器又分为七段数码LED显示器、多段字符LED显示器和点阵字符LED显示器等。尽管种类繁多，但它们有其共同的特点：低成本、高亮度、长寿命、显示直观、能用于数字及简单的字符显示。广泛用于各种参数及状态显示。3.1 3.1 七段七段LEDLED显示器显示器1 1、结构与原理、结构与原理abcdefghoabcde

2、fgho(a) 共阴连接(b) 共阳连接(c) 引脚图bafgedhcooabcdefgh2 2、七段、七段LEDLED显示器的接口和编程显示器的接口和编程（1 1）静态显示接口）静态显示接口 680 x 8+5VD03Q02D14Q15D27Q26D38Q39D413Q412D514Q515D617Q616D718Q719CLK11CLR1Vcc20GND1074LS273P0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7P2.7WR8051P0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7P2.7WR+5Vb6a7o8f9g10e1d2h5c4o3数码显示块静态

3、硬件译码显示接口静态硬件译码显示接口 b6a7o8f9g10e1d2h5c4o3共阳LED数码显示块A7B1C2D6LT3BI/ RBO4RBI5a13b12c11d10e9f15g1474LS47680 x 8Vccb6a7o8f9g10e1d2h5c4o3共阳LED数码显示块A7B1C2D6LT3BI/ RBO4RBI5a13b12c11d10e9f15g1474LS47680 x 8VccVccVccP1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.78051P1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7（2 2）动态扫描显示接口）动态扫描显示接口 b6a7

4、o8f9g10e1d2h5c4o3b6a7o8f9g10e1d2h5c4o3b6a7o8f9g10e1d2h5c4o3b6a7o8f9g10e1d2h5c4o3100 x 81A121A241A361A482A1112A2132A3152A4171Y1181Y2161Y3141Y4122Y192Y272Y352Y431G12G1974LS244P0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7P2.7WRP1.0P1.1P1.2P1.38051P0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7P2.7WRP1.0P1.1P1.2P1.31A121A241A361A4

5、82A1112A2132A3152A4171Y1181Y2161Y3141Y4122Y192Y272Y352Y431G12G1974LS244D13Q12D24Q25D37Q36D48Q49D513Q512D614Q615D717Q716D818Q819CLK11CLR174LS273VCC3.2 3.2 点阵点阵LEDLED显示器显示器H0H1H2H3H4H5H6H7L0L1L2L3L4L5L6L747 x 8H0H1H2H3H4H5H6H7L0L1L2L3L4L5L6L78x8点阵模块H0H1H2H3H4H5H6H7L0L1L2L3L4L5L6L7P0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7P2.7WRP1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.78051P0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7P2.7WRP1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.71A121A241A361A482A1112A2132A3152A4171Y1181Y2161Y3141Y4122Y192Y272Y352Y431G12G1974LS2441A121A241A361A482A1112A2132A3152A4171Y1181Y2161Y3141Y4122Y192Y272Y35