TC7135微处理器接口

Manydataacquisitionsystemsrequirebothavisualdisplayanda

computerinterface.TheTC7135fromMicrochipTechnologyisa

4-1/2digitAnalog-to-Digitalconverter(ADC)whichcaneasily

providebothofthesefunctions.TheTC7135’smultiplexedBCD

outputsinterfaceeasilytolowcostLEDorLCDdecoder/drivers,

suchastheTC7211A.Also,theTC7135’sdataoutputssimplify

computerinterfacing.

Thisapplicationnotewillpresentboththehardwareandsoftware

requiredtointerfacetheTC7135toamicroprocessor.Thecircuit

wasdevelopedfora6502µPand6522I/Oport,butthedesigncan

easilybemodifiedforotherµPsandI/Oports.AN16TC7135MicroprocessorInterfaceLowRoll-OverError......................................±1countAuthor:WesFreeman,MicrochipTechnology,Inc.ValidPolarityat000reading(the+and