单片机最小系统电路图.pdf

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1、 单片机最小系统电路图 单片机基础实践 D0D1D2D3D4D5D6D7EAALEPSENP1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78RST9P3.0(RXD)10P3.1(TXD)11P3.2(INT0)12P3.3(INT1)13P3.4(T0)14P3.5(T1)15P3.6(WR)16P3.7(RD)17XTAL218XTAL119GND20P2.021P2.122P2.223P2.324P2.425P2.526P2.627P2.728PSEN29ALE30EA31P0.732P0.633P0.534P0.435P0.336P0.237P0.138P

2、0.039Vcc40U1STC8 9C52P10P11P12P13P14P15P16P17P20P21P22P23P24P25P26P27P30P31P32P33P34P35P36P37X2X1RSTVcc YC1C2X1X2 21DC123456K11234USBUSBVCC 图5 晶振电路 图6 USB 供电电路 BCC1+1V+2C1-3C2+4C2-5V 1-6T2OUT7R2IN8T2OUT9T2IN10T1IN11R1OUT12R1IN13T1OUT14GND15VCC16U3MAX232162738495J6D3串口直连线+C110uF+C210uF+C310uF+C410uFV

3、cc+C510uFP3.0P3.1R11k 图 7 串行口电路图 VCCR111KR121KR131KR141KR151KR161KR17RES2R18RES2P10P11P12P13P14P15P16P17D0LEDD1LEDD2LEDD3LEDD4LEDD5LEDD6LEDD7LED 图 8 8 个 LED 灯电路图 S1SW-PBS2SW-PBS3SW-PBS4SW-PBS5SW-PBS6SW-PBS7SW-PBS8SW-PBS9SW-PBS10SW-PBS11SW-PBS12SW-PBS13SW-PBS14SW-PBS15SW-PBS16SW-PBkey0key1key2key3key

4、4key5key6key7k0SW-PBk1SW-PBk2SW-PBk3SW-PBkey00key01key02key03 图 9 矩阵键盘和独立键盘电路图 a1b2c4d6dp3v5e7g8f9v10SMG0a1b2c4d6dp3v5e7g8f9v10SMG1a1b2c4d6dp3v5e7g8f9v10SMG2a1b2c4d6dp3v5e7g8f9v10SMG3a1b2c4d6dp3v5e7g8f9v10SMG4a1b2c4d6dp3v5e7g8f9v10SMG5E1D02D13D24D35D46D57D68D79L11GND10Q712Q613Q514Q415Q316Q217Q118Q01

5、9VCC20IC174HC573E1D02D13D24D35D46D57D68D79L11GND10Q712Q613Q514Q415Q316Q217Q118Q019VCC20IC274HC573A BBBBBBAAAAAGGGGGGFFFFDPDPDPDPDPDPEEEEEEDDDDDDCCCCCCVCCVCCABCDEFGDPWE0WE1WE2WE3WE4WE5FFWE0WE1WE2WE3WE4WE5a1b2c4d6dp3v5e7g8f9v10SMG6a1b2c4d6dp3v5e7g8f9v10SMG7BBAAGGDPDPEEDDCCFFWE6WE7WE6WE7D0D1D2D3D4D5D6D

6、7D0D1D2D3D4D5D6D7P20P21 图 10 数码管和锁存器（74HC573）电路图 IN31IN42IN53IN64IN75START6EOC7D38EN9CLK10Vcc11ref(+)12GND13D114D215ref(-)16D017D418D519D620D721ALE22ADD-C23ADD-B24ADD-A25IN026IN127IN228U7ADC0809W310kVccVccD0D1D2D3D4D5D6D7ABCSTSTEOCENCLKIN0IN1IN2IN3IN4IN5IN6IN7 图 11 ADC0809 电路 图 CS1WR12AGND3D34D25D16D07Vref8Rfb9DGND10Iout111Iout212D713D614D515D416XFER17WR218ILE19Vcc20U8DAC0832D0D1D2D3D4D5D6D7/WR/CSVccRfVout2Vout1 图12 DAC0832电路 图 VCCW110KR410VCC1 2 3 4 5 6 7 8 9101112131415161602D0D1D2D3D4D5D6D7RSRWEN 图 13 液晶 LCD1602 电路图