On Semi Q32M210 32位MCU血糖儀應(yīng)用方案

1、On Semi Q32M210 32位MCU血糖儀應(yīng)用方案On Semi公司的Q32M210是精密的混合信號(hào)32位MCU, 集成了2個(gè)16位模數(shù)轉(zhuǎn)換器、高精度電壓參考、3個(gè)10位數(shù)模轉(zhuǎn)換器和基于ARM Cortex-M3 32位內(nèi)核以及高度可配置的模擬前端及可編程的32位內(nèi)核和256kB閃存.芯片還集成所有關(guān)鍵功能，包括實(shí)時(shí)時(shí)鐘、電源管理、112段液晶顯示屏(LCD)接口、片上低阻抗開關(guān)、非限定(uncommitted)運(yùn)算放大器、精密電壓參考( 50 PPM/)及電阻電容(RC)振蕩器。器件具有高精度感測,可預(yù)測工作以及低功耗等特性,主要用于便攜感測應(yīng)用如病人監(jiān)測器、無線心電圖機(jī)(ECG)和

2、血糖儀等便攜醫(yī)療設(shè)備.本文介紹了Q32M210主要特性,方框圖, 正常工作條件配置圖以及典型和擴(kuò)展電源配置圖, 血糖儀應(yīng)用電路圖和相應(yīng)的材料清單.Q32M210 is a precision, mixedsignal 32bit microcontroller. Themicrocontroller is built on the high performance ARM Cortex_M3 processor.The microcontroller incorporates a highly configurable sensor interface designed to work dir

3、ectly with a wide range of sensors having multiple characteristics, including specialized electrochemical sensors. The sensor interface includes dual programmable gain amplifiers, dual 16bit AnalogtoDigital converters, triple 10bit DigitaltoAnalog converters (for voltage waveform generation and othe

4、r applications) and three uncommitted, lownoise opamps with configurable signal multiplexing. Flexible connectivity to external nonvolatile memory, personal computers, wireless devices, LCD displays and a wide range of other peripherals is enabled by several digital interfaces including I2C, USB (2.

5、0 fullspeed compliant) and a highspeed SPI/SQI interface.The microcontroller features flexible clocking options as well as intelligent failure monitoring of power and application interruptions required by high performance, portable, battery operated applications.All necessary clocks including an int

6、ernal oscillator, realtime clock and a dedicated clock for USB operation are available onchip (external crystals required for RTC and USB).An embedded power management unit, which incorporates several low power modes, allows application developers to minimize both standby and active power under a wi

7、de range of operating conditions.The ultralow sleep current makes the microcontroller ideal for applications that remain inactive for long periods of time. A large onchip nonvolatile flash memory (256 kB) combined with onchip SRAM (48 kB) supports complex applications and simplifies application deve

8、lopment. The flash contains builtin hardware error checking and correction (ECC) for application reliability. Additionally, a configurable DMA unit which supports independent peripheraltomemory, memorytomemory, and memoryto peripheral channels provides flexible, low power data transfers without proc

9、essor intervention.A suite of industrystandard development tools, handson training and full technical support are available to reduce design cycle time and speed timetomarket.Q32M210 主要特性:Ultra LowPower and Smart Power ManagementLess than 400 _A / MHz, up to 16 MHz clock speedReliable operation down

10、 to 1.8 V; 3.3 V nominal supply voltageUltralowcurrent sleep mode with Realtime Clock active ( 750 nA)Lowcurrent standby mode with register and SRAM retention ( 26 _A)Integrated power supplies minimize need for external components. Only a minimum of external passives is requiredEfficient, Powerful a

11、nd Robust Processing Architecture32bit ARM CortexM3 CPU256 kB onchip flash with integrated hardware ECC for program and user data storage48 kB onchip SRAMFlexible DMA, 4 generalpurpose timers, CRC calculatorNo external voltage required for flash write operationLowNoise, LowLeakage, LowTemperature Dr

12、ift, Configurable Sensor InterfaceTriple ultra lownoise opamps with lowleakage inputs and configurable outputsDual onchip Programmable Gain Amplifiers (PGA) and ADCs with flexible input multiplexing and wide dynamic rangeReconfigurable voltage detection unitOptimal dynamic range scaling of sensor si

13、gnalsFlexible onchip signal routing for dynamic reconfigurabilityMinimal temperature drift of gain and offset errors allows for precise calibrationBuiltin Temperature SensorPredictable OperationDedicated brownout protection circuit prevents execution of code outside of operating rangeIntegrated hard

14、warebased ECC for onchip flash maintains code and data integrityWatchdog timerHigh Precision AnalogtoDigital Conversion and DigitaltoAnalog ConversionDual 16bit ADCs with onthefly data rate configurabilityTriple 10bit DACs with configurable dynamic rangePrecision Voltage ReferenceOnchip, low tempera

15、ture drift ( 50 ppm/C) voltage reference for ADCs and DACsFlexible OnChip ClockingProcessor supports speeds up to 16 MHz provided either through internal oscillator or externally supplied clockFlexible Sensor InterconnectionsTriple low Ron analog multiplexers, including an 8:1 input muxQuad SPST and

16、 quad multiswitches for effective simultaneous connection to different sensorsUSB 2.0 FullSpeed InterfaceBuiltin transceiver for 2.0 Fullspeed compatible (12 Mbps) operation with dedicated power supplyFlexible External InterfaesConfigurable Interface Wakeup pins with configurable pullups and pulldowns8 Configurable GPIO interruptsDual UARTs, dual SPI, SQI, I2C, PCM (including I2S mode), GPIOsLCD I