摩托罗拉68HC12微控制器接口的Microchip的MCP41XXX和MCP42XXX数字电位器

TheMCP41XXXandMCP42XXXfamilyofdigital

potentiometerscommunicateusingastandard3-wire

SPI™compatibleinterface.Thisapplicationnotewill

covercommunicationbetweenthesedevicesandthe

Motorola68HC12familyofmicrocontrollers.Specifi-

cally,theMC68HC912B32evaluationboardwasused.MAN757InterfacingMicrochip’sMCP41XXXandMCP42XXXDigitalPotentiometerstoMotorola’s68HC12MicrocontrollerMCP41XXXandMCP42XXXpotentiometersare8-bitAuthor:EzanaHaileor256tappotentiometers.All8bitsinthedatabyteareMicrochipTechnology,Inc.wiperdatabits.Therearefourimportantbitsinthecommandbyte.Bits