（DS41204）内部RC振荡器自动校准到±1％

Thisapplicationnotedescribesatechniqueusedto

calibratetheinternaloscillatoronthePIC12F6XX

devices.Thistechniqueallowstheinternaloscillatorto

becalibratedwithin±1%.Seethetestcircuitshownin

Figure1.

Thisapplicationnoteisusefulinthefollowingapplica-

tions:

1.Highvolumeproductionenvironment.

2.Batteryapplicationsusingon-boardcalibration

torecalibratetheinternalRCoscillatorasthe

batteryvoltagedrops.

3.Applicationsthatareexposedtoavarying

voltageandtemperaturerangecouldhave

intelligenton-boardrecalibration.AN250Auto-calibrationofthePIC12F6XXInternalRCOscillatorto±1%THEORYOFOPERATIONAuthor:MikeRyleeMicrochipTechnologyInc.EquipmentUsedHP54645DOscilloscopewithdigitalprobesAGILENT33120AFunctionGeneratorINTRODUCTIONHPE3620APowerSupplyThisapplicationnotedescribesatechniqueusedtoDigitalmultimeterwithfrequencycount