基于STC89C52单片机最小系统的设计.pdf

基于STC89C52单片机最小系统的设计

DesignofSTC89C52MinimumSystem

1.DesignContentandRequirements

DesignXXX:DesignandnofSTC89C52MinimumSystem

basedonSingle-chipputer.

DesignRequirements:Theinputsignalcanbeintheformof

sensors。voltage。current。switches。etc。Thesingle-chip

modelcanbechosenbyyourself(51.128.430.etc.)。Theoutput

controlsignalcanbeanalogvoltageordigitalsignal。andthe

controlobjectcanbemotor(DCmotor。XXX)。switch。display。

etc。(Note:Single-chipputer。sensorcircuitmoduleand

integratedcircuitchipcanbeusedforn.)

Equipmentused:PhotographicplateandcommonPCBn

equipment。commonelectronicassemblytools。multimeter。

oscilloscopeandelectroniccomponents(seeappendixfordetails).

2.STC89C52Single-chipputer

2.1ntoSTC89C52Single-chipputer

Asingle-chipputer。abbreviatedasMCU。XXX(MCU)。

whichwasfirstusedintheindustrialcontrolfield。Thesingle-

chipXXXwithonlyCPUonthechip。TheXXXalargenumber

ofperipheraldevicesandCPUonachip。makingthecomputer

systemXXXintocomplexcontroldeviceswithstrictvolumeXXX

nalterms。asingle-chipXXXintegratesmicroprocessors。XXX.

2.2CharacteristicsofSingle-chipputer

1)Highn。smallsize。andhighreliability

Thesingle-chipputerintegratesusnalcomponentsona

crystalchip。withhighXXX。withshortinternalwiringand

betteranti-industrialnoiseperformancethangeneral-purpose

CPUs。Thesingle-chipputerprogramns。XXXandnoteasily

damaged。Manysignalchannelsareinachip。sothereliabilityis

high.

2)Strongcontroln

Inordertomeettherequirementsofthecontrolobject。then

systemofthesingle-chipputerhasrichns:branchtransferability。

I/Oportlogicnandbitprocessingability。whichareverysuitable

forspecialcontrolns.

3)Lowvoltage。lowpowern。easytoproduce