点阵显示电子时钟原理图

+5VRA2RA1RA013121011141312101114131210111413121011ESRCLRSRCLKESRCLRSRCLKESRCLRSRCLKESRCLRSRCLKRCLKRCLKRCLKRCLKSERSERSER74HC59574HC59574HC59574HC595Q7O7O6O5O4O3O2O1O0Q7O7O6O5O4O3O2O1O0Q7O7O6O5O4O3O2O1O0Q7S3S2S19765432115976543211597654321159USB4321P0.1P0.0LEDR1510D1+5VU2C3+5VR24.7KU1ARA0274HC041RA1RA210uF1234567891011121314151617181920P1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7RSTP3.0(RXD)P3.1(TXD)P3.2P3.3P3.4(T0)P3.5(T1)P3.6P3.7XTAL2XTAL1GNDAT89C51C2VccP0.0(AD0)P0.1(AD1)P0.2(AD2)P0.3(AD3)P0.4(AD4)P0.5(AD5)P0.6(AD6)P0.7(AD7)EA/VPPALE/PROGPSENP2.7(A15)P2.6(A14)P2.5(A13)P2.4(A12)P2.3(A11)P2.2(A10)P2.1(A9)P2.0(A8)4039383736353433323130292827262524232221P0.1P0.0R32kR1200Q1PNP13121110131211101312111013121110LS11312111098989898D2D3D4D598D6C1SPEAKER22pF12MHzY2123456712345671234567123456722pFBT1U3DS1302132.768KHzY1234Vcc2X1X2GNDVcc1SCLKI/ORST8765+5V1234567765432115O7O6O5O4O3O2O1O0SERU3U4U514U6

+5VRA2RA1RA013121011141312101114131210111413121011ESRCLRSRCLKESRCLRSRCLKESRCLRSRCLKESRCLRSRCLKRCLKRCLKRCLKRCLKSERSERSER74HC59574HC59574HC59574HC595Q7O7O6O5O4O3O2O1O0Q7O7O6O5O4O3O2O1O0Q7O7O6O5O4O3O2O1O0Q7S3S2S19765432115976543211597654321159USB4321P0.1P0.0LEDR1510D1+5VU2C3+5VR24.7KU1ARA0274HC041RA1RA210uF1234567891011121314151617181920P1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7RSTP3.0(RXD)P3.1(TXD)P3.2P3.3P3.4(T0)P3.5(T1)P3.6P3.7XTAL2XTAL1GNDAT89C51C2VccP0.0(AD0)P0.1(AD1)P0.2(AD2)P0.3(AD3)P0.4(AD4)P0.5(AD5)P0.6(AD6)P0.7(AD7)EA/VPPALE/PROGPSENP2.7(A15)P2.6(A14)P2.5(A13)P2.4(A12)P2.3(A11)P2.2(A10)P2.1(A9)P2.0(A8)4039383736353433323130292827262524232221P0.1P0.0R32kR1200Q1PNP121110121110121110121110121110LS1121110D69898989898765432115O7O6O5O4O3O2O1O0SERU3U4U514U6D2D3D4D598D6C1SPEAKER22pF12MHzY21234567123456712345671234567123456722pFBT1U3DS1302132.768KHzY1234Vcc2X1X2GNDVcc1SCLKI/ORST8765+5V1234567

开始 初始化 显示 响铃 有无时钟？ 读键 是否为调时、定时？ 是否修改？ 调时 调试？ 定时 结束