Data Sheet

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Pin Description
Li+ ThispinisinternallyconnectedtothepositiveterminaloftheLiPobatteryconnector.
VUSB ThispinisinternallyconnectedtotheUSB(+ve)supply.
3V3 Thispinistheoutputoftheon-board3.3Vregulator.
GND Systemgroundpin.
EN Deviceenablepinisinternallypulled-up.Todisablethedevice,connectthispintoGND.
RST Active-lowsystemresetinput.Thispinisinternallypulled-up.
MD ThispinisinternallyconnectedtotheMODEbutton.TheMODEfunctionisactive-low.
RX PrimarilyusedasUARTRX,butcanalsobeusedasadigitalGPIO.
TX PrimarilyusedasUARTTX,butcanalsobeusedasadigitalGPIO.
SDA PrimarilyusedasdatapinforI2C,butcanalsobeusedasadigitalGPIO.
SCL PrimarilyusedasclockpinforI2C,butcanalsobeusedasadigitalGPIO.
MO,MI,SCK ThesearetheSPIinterfacepins,butcanalsobeusedasadigitalGPIO.
D2-D8 ThesearegenericGPIOpins.D2-D8arePWM-able.
A0-A5 TheseareanaloginputpinsthatcanalsoactasstandarddigitalGPIO.A0-A5arePWM-able.
PINDESCRIPTION