数字温度计1602原理图PCB图

123456ABCD654321DCBATitleNumberRevisionSizeBDate:13-Nov-2011SheetofFile:E:\设计专用文件\项目开发\数字温度计\数字温度计1602.ddbDrawnBy:P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78RST9P3.0(RXD)10P3.1(TXD)11P3.2(INT0)12P3.3(INT1)13P3.4(T0)14P3.5(T1)15P3.6(WR)16P3.7(RD)17XTAL218XTAL119GND20(A8)P2.021(A9)P2.122(A10)P2.223(A11)P2.324(A12)P2.425(A13)P2.526(A14)P2.627(A15)P2.728PSEN29ALE/PROG30EA/VPP31(AD7)P0.732(AD6)P0.633(AD5)P0.534(AD4)P0.435(AD3)P0.336(AD2)P0.237(AD1)P0.138(AD0)P0.039VCC40U189C51Y112MHzC222C322COM1R12R23R34R45R56R67R78R89RP11K1234K1SET1234K2DEC1234K3ADDGND1DQ2VCC3U2DS18B20R14.7KD1POWERVCCR210KR321P1DCVCC112233445566S1SWITCHR34.7KVCCVCCVCCR44.7KALAMLS1SPEAKERbceQ1PNPGND1VCC2V03RS4R/W5EN6D07D18D29D310D411D512D613D714A15K16LCD1LCD1602123VR110KVCCVCCD0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7ENR/WRSRSR/WEN+C110uFVCCVCCR54.7KD2alam_LEDVCC