Data Sheet

IMU(InertialMeasurementUnit)
BoschSensortecBMI160
SPIInterfaceconnectedtoSPI1(MISO1,MOSI1,SCK1)
ChipSelect:SEN_CS(CSDecoder2)
CanwakenRF52MCUonmovement(SEN_INT1)
16bitdigital,triaxialaccelerometerandtriaxialgyroscope
Verylowpowerconsumption:typically925μAwithaccelerometerandgyroscopeinfull
operation
AllocatableFIFObufferof1024bytes(capableofhandlingexternalsensordata)
Hardwaresensortime-stampsforaccuratesensordatafusion
Integratedinterruptsforenhancedautonomousmotiondetection
PMIC
TexasInstrumentsbq24195
I2Cinterface(Wire1address0x6B)
CaninterruptnRF52MCUonchargestatusandfault
HandlesswitchingbetweenUSB,VIN,andbatterypower
LiPobatterycharger
Chargesafetytimer,thermalregulation,andthermalshutdown
Optionalconnectionforbatterythermistor
FuelGauge
MAX17043
I2Cinterface(Wire1address0x36)
CaninterruptnRF52MCUonlowbattery
Fuel-gaugesystemforsinglecelllithium-ion(Li+)batteries
Precisionvoltagemeasurement±12.5mVAccuracyto5V
Accuraterelativecapacity(RSOC)CcalculatedfromModelGaugealgorithm
Nooffsetaccumulationonmeasurement
Nofull-to-emptybatteryrelearningnecessary
RTC/Watchdog
AmbiqMicroAM18X5Real-TimeClockwithPowerManagement
55nApowerconsumption
Crystaloscillator
I2Cinterface(Wire1address0x68)
CanwakeMCUfromhibernate(SLEEP_MODE_DEEP)ataspecifictimeusing RTC_INT.
Programmablehardwarewatchdog
RTCpoweredbyXC6504ultra-lowconsumptionregulatorsothemainTPS62291canbeshut
downfromRTC
OTHERCOMPONENTS