单片机原理与接口技术 (18).pdf

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1、单片机原理与接口技术目录CONTENTMCS-51MCS-51MCS-51MCS-5189C51CPUOSC128B RAM216/I/O-P34KBROMVCCVSST0 T1TXD RXDINT0 INT1128B SFRI/O-P0I/O-P2I/O-P1P0.0-P0.7P2.0-P2.7P1.0-P1.7RD WRALEXTAL1XTAL2PSEN EAMCS-51VCCRSTXTAL1XTAL2/EA/PSENALERXDTXD/INT0/INT1 T0T1/WR/RDGND87C51EPROMAT89C51ATMELFLASHP0P1P2P3MCS-51DIP-40MCS-518

2、0C51PDIP1.(2)2.(2)3./I/O(32)4.(4)MCS-51/(I/O)P0.0P0.739328I/OROMRAM8P1.0P1.7188I/OI/OP2.0P2.721288I/OROMRAM8P3.0P3.710178I/OP3I/OMCS-51/(I/O)P3P3.0RXDP3.1TXDP3.2INT00 P3.3INT11 P3.4T0/0 P3.5T1/1 P3.6WRRAMP3.7RDRAMAT89C51U127P2.6/A1426P2.5/A1325P2.4/A1224P2.3/A1123P2.2/A1022P2.1/A921P2.0/A828P2.7/A15

3、15P3.5/T116P3.6/WR17P3.7/RD14P3.4/T013P3.3/INT112P3.2/INT011P3.1/TXD10P3.0/RXD8P1.77P1.66P1.55P1.44P1.33P1.22P1.11P1.032P0.7/AD733P0.6/AD634P0.5/AD535P0.4/AD436P0.3/AD337P0.2/AD238P0.1/AD139P0.0/AD09RST29PSEN31EA30ALE19XTAL118XTAL2WRAD15AD7AD6AD5AD4AD3AD2AD1AD0MCS-51/(I/O)/I/OMCS-51/(I/O)1MOV P1,#00

4、H2MOV P1,#0FFH3MOV P1,#0AAH4CLR P1.05SETB P1.0111111110000000011111111010101011ALEWRRDP1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7+5VMCS-511111111111111111S0+5 V4.7 k WeMOV P3,#11111111BMOV A,P3 ALEWRRDP3.0P3.1P3.2P3.3P3.4P3.5P3.6P3.78051AI/O1”FETP3.4AP3.41 1 1 1 1 1 1 101VCCVSSXTAL2XTAL1RSTP0.0P0.1P0.2 P0.3 P0

5、.4 P0.5 P0.6 P0.7P1.0P1.1P1.2 P1.3 P1.4 P1.5 P1.6 P1.7P2.7 P2.6 P2.5 P2.4 P2.3 P2.2 P2.1 P2.0ALEP3.0P3.1P3.2 P3.3 P3.4 P3.5 P3.6 P3.7EAPSENRXD/TXD/INT0/INT1/T0/T1/WR/RD/1234567891011121314151617181920403938373635343332313029282726252424222180318051 875189C51MCS-51VCC40+5VVSS2040 MCS-5120VCC+5V780512

6、3输出VCC+5V输入+912V78055VMCS-51XTAL119,XTAL218,HMOSCHMOSMCS-511819foscADC6MHz11.0592MHz12MHzMCS-518051XTAL1C1C2XTAL21MCS-51RST/VPD9RSTRST2VPDRAMVCCVPDRAMRAMMCS-51RSTVccVR（Ic）R=110kC=10uftTRCVccIcVccMCS-51CPURSTCPUPC=0000HSP=07HSFR0”P0P31”FFHRAMREST=1CPUPC=0000HCPUMCS-51CPUROM0000HCPUMCS-51RSTMCS-51RST1

7、K10K 10UF 100 1 8 2 73 64 5/WDORESTWDI/PFO/MRVccGNDPFIAT89C51RESETP1.0/INT0+9V Vcc+5VMAX813LMAX813LMCS-51ALE/PROG30ALEALEP088ALE1/6PROG89C51Flash RomMCS-51ALEALEfosc12 TMCS-51PSEN29ROMRAMA15A14:A8A7 O7:A0 O0OE64K ROMMCS-51/OED7 Q774LS373D0 Q0G /LP2.7:P2.0P0.7:P0.0ALE/EAPsenMCS-51EA/Vdd31:EA04KBCPUROM4KBCPUROMEAROM8031EAROM+12VEA=1PC0FFFH1000HMCS-51/EA+VCCGNDMCS-51MCS-51ROM4K(EA=1)RAM256BROM64K4K000HFFFH0000HFFFFH0FFFH1000HEA=1ROM4KEA=0CPUROM0000H64KEA=1ROM4KROM1000HMCS-51启迪智慧思维创造精彩人生