1、第三章第三章LEDLED顯示及其接口顯示及其接口 單片機應用系統中，常常需要進行信息顯示，用于顯示的器件有很多，如CRT、LED、LCD、場致發光器件等。常用的顯示器有LED（發光二極管顯示器）和LCD（液晶顯示器）兩種。在純數值或簡單字符顯示應用中LED顯示器又占有明顯的優勢。 LED顯示器又分為七段數碼LED顯示器、多段字符LED顯示器和點陣字符LED顯示器等。盡管種類繁多，但它們有其共同的特點：低成本、高亮度、長壽命、顯示直觀、能用于數字及簡單的字符顯示。廣泛用于各種參數及狀態顯示。3.1 3.1 七段七段LEDLED顯示器顯示器1 1、結構與原理、結構與原理abcdefghoabcde

2、fgho(a) 共陰連接(b) 共陽連接(c) 引腳圖bafgedhcooabcdefgh2 2、七段、七段LEDLED顯示器的接口和編程顯示器的接口和編程（1 1）靜態顯示接口）靜態顯示接口 680 x 8+5VD03Q02D14Q15D27Q26D38Q39D413Q412D514Q515D617Q616D718Q719CLK11CLR1Vcc20GND1074LS273P0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7P2.7WR8051P0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7P2.7WR+5Vb6a7o8f9g10e1d2h5c4o3數碼顯示塊靜態

3、硬件譯碼顯示接口靜態硬件譯碼顯示接口 b6a7o8f9g10e1d2h5c4o3共陽LED數碼顯示塊A7B1C2D6LT3BI/ RBO4RBI5a13b12c11d10e9f15g1474LS47680 x 8Vccb6a7o8f9g10e1d2h5c4o3共陽LED數碼顯示塊A7B1C2D6LT3BI/ RBO4RBI5a13b12c11d10e9f15g1474LS47680 x 8VccVccVccP1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.78051P1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7（2 2）動態掃描顯示接口）動態掃描顯示接口 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 點陣點陣LEDLED顯示器顯示器H0H1H2H3H4H5H6H7L0L1L2L3L4L5L6L747 x 8H0H1H2H3H4H5H6H7L0L1L2L3L4L5L6L78x8點陣模塊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