Technical Data

USBI2CUSBtoI2CCommunicationsModule
TechnicalSpecification
TheUSBI2CmoduleprovidesacompleteinterfacebetweenyourPCandtheI2Cbus.ThemoduleisselfpoweredfromtheUSBcableandcan
supplyupto70mAat5vforexternalcircuitryfromastandard100mAUSBport.ThemoduleisanI2Cmasteronly,notaslave.
FirstStepGetTheDrivers
TheUSBI2CmoduleusestheFTDIFT232RUSBchiptohandlealltheUSBprotocols.ThedocumentationprovidedbyFTDIisverycomplete,
andisnotduplicatedhere.BeforeusingtheUSBI2C,youwillneedtoinstallFTDI'sVirtualCOMPort(VCP)Drivers.Thesedriversappearto
thesystemasanextraComPort(inadditiontoanyexistinghardwareComPorts).ApplicationsoftwareaccessestheUSBdeviceinthesame
wayasitwouldaccessastandardWindowsComPortusingtheWindowsVCOMMAPIcallsorbyusingaComPortLibrary.Driversare
availableforWindows,Apple,LinuxandOpenBSDsystemsdirectlyfromtheFTDIwebsite.Youshouldgetandinstallthedriversnow,before
youconnecttheUSBI2Ctoyourcomputer.TheDriverspageishere.
WhichCOMport?
Afterinstallingthedrivers,andpluggingintheUSBI2CmoduletoaspareUSBport,youwillwanttoknowwhichCOMportithasbeen
assignedto.ThiswillvaryfromsystemtosystemdependingonhowmanyCOMportsyoucurrentlyhaveinstalled.Tofindoutwhereitis,right
clickonyour"MyComputer"desktopiconandselectthe"DeviceManager"tab.Nowscrolldownandopenthe"Ports(COM&LPT)"tab.You
shouldseetheUSBserialportlistedCOM2intheexamplebelow.IfyouwanttochangetheCOMportnumberjustrightclickonit,select
properties,selectadvancedandselecttheCOMportnumberfromtheavailablelist.TheCOMportshouldbesetupfor19200baud,8databits,
noparityandtwostopbits.
Connections

0vground
Input1
SCLI/O2