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1、Lars SundellSenior Project Manager, HardwareGlobal Tech Tour 2012nRF51 Series introduction- A brief look at the underlying hardwarenRF51 Series IntroductionnRF51 Series IntroductionnRF51 Series IntroductionGoal with nRF51 SeriesFlexibilityConsistencyLow PowernRF51 Series IntroductionGoal with nRF51

2、SeriesFlexibilityConsistencyLow PowerCore functionsnRF51 Series IntroductionThe CPUSys tick timerWIC(Wake Up Interrupt controller)AHB-lite interfaceNVIC(Nested Vectored Interrupt Controller)ARMCortex M0One cyclemultiplierCPUDebuggerDebug Access PortBreak point 1DebuggerBreak point 2Break point 3Brea

3、k point 4Watch point 1Watch point 2nRF51 Series IntroductionAddress map0xE010 00000xE000 0000Private Peripheral Bus0x5000 0000Peripherals0x4000 0000Peripherals0x2000 0000RAM0x1000 10000x1000 0000UCIRFICR0x0000 0000CodenRF51 Series IntroductionMulti Protocol RadioANT1ANT2Analog front end+ Sensitivity

4、- Power usageFWDigital front endAddressModePacket assemblyCRCAddress matchnRF51 Series IntroductionEasy DMARX data RAM pointerTX data RAM pointerANT1ANT2RADIORX dataTX dataRAMnRF51 Series IntroductionGoal with nRF51 SeriesFlexibilityConsistencyLow PowerSignalling and ConnectivitynRF51 Series Introdu

5、ctionSignalling flow between peripheralsNormal flowBetter flowConfigure TimerConfigure Radio Configure Pins SleepConfigure and start TimerSleepRead Timer InterruptRegister Configure and start RadioSleepThe CPU would notbe needed anymoreRead Radio InterruptRegister Configure PinsSleepGPIOGPIOCPURADIO

6、RADIOCPUTIMERTIMERCPUCPUnRF51 Series IntroductionIRQvs Programmable Peripheral Interconnect (PPI)PPI eventsand tasksPPI eventsand tasksPeripheralIRQ linesPeripheralPPI ControllerCPUPeripheralIRQ linesPeripheralBusnRF51 Series IntroductionPPI - Block DiagramPPITaskIRQPPIEventEventsINT ENShortsPeriphe

7、ral CoreTasksnRF51 Series IntroductionPPI ConnectionsEventsPPI ChannelsTasksPeripheralPeripheralWrite your events address to the channels event endpoint registerWrite your tasks address to the channels task endpoint registerPeripheralPeripheralPeripheralnRF51 Series IntroductionPPI - Real-life examp

8、lePPI (3)Task EPEvent EPPacket TimerSTARTSTOPCMP0CLEARProtocol TimerSTARTSTOPCMP0CLEARPPI (0)Task EPEvent EPPPI (4)Task EPEvent EPRadioSTARTREADYRXENABLEADDMTCHTXENABLEDISABLEDDISABLEENDSHORTPPI (2)Task EPEvent EPPPI (1)Task EPEvent EPnRF51 Series IntroductionGPIOTE (GPIO Tasks and Events)PPI events

9、and tasksPIN3PINPINBusCPU PIN3PIN2PIN1PIN0GPIOTEPPI ControllerPeripheral1PeripherallinesnRF51 Series IntroductionPeripheral pin accessPCBchipTWI(I2C)PinCrossbarnRF51 Series IntroductionGoal with nRF51 SeriesFlexibilityConsistencyLow PowerPower and ClocknRF51 Series IntroductionPower ManagemeSnytstem

10、 OnffARMCortex M0RAMSWDIOSWCLKProgrammemoryDebuggerWDTNVMCWOPGPIOP0.0-31ANT1ANT2RadioP0.0-31GPIOTETimerRTCECBSCK MISO MOSISPIAHB-LitenRF51 Series IntroductionPower and Clock1.2V ULP(Ultra Low Power regulator)ResourcesFull 1.2V regulator16Mhz clockRequestsRTCABPeripheralsPPITaskEventTaskEventTaskEven

11、tnRF51 Series IntroductionSystem OnARMCortex M0RAMSWDIOSWCLKProgrammemoryDebuggerWDTNVMCWOPGPIOP0.0-31ANT1ANT2RadioP0.0-31GPIOTETimerRTCECBSCK MISO MOSISPIAHB-LitenRF51 Series IntroductionGoal with nRF51 SeriesFlexibilityConsistencyLow PowernRF51 Series IntroductionCode ReusenRF51 Series IntroductionGoal with nRF51 SeriesFlexibilityConsistencyLow PowernRF51 Series IntroductionCortexM0Ultra low power¡¡¡¡¡¡Programmable Peripheral Interconnect (PPI)Cortex M0Fast Startup Time RadioAutomated Power SystemLow P