On Semi Q32M210 32位MCU血糖仪应用方案

1、On Semi Q32M210 32位MCU血糖仪应用方案On Semi公司的Q32M210是精密的混合信号32位MCU, 集成了2个16位模数转换器、高精度电压参考、3个10位数模转换器和基于ARM Cortex-M3 32位内核以及高度可配置的模拟前端及可编程的32位内核和256kB闪存.芯片还集成所有关键功能，包括实时时钟、电源管理、112段液晶显示屏(LCD)接口、片上低阻抗开关、非限定(uncommitted)运算放大器、精密电压参考( 50 PPM/)及电阻电容(RC)振荡器。器件具有高精度感测,可预测工作以及低功耗等特性,主要用于便携感测应用如病人监测器、无线心电图机(ECG)和

2、血糖仪等便携医疗设备.本文介绍了Q32M210主要特性,方框图, 正常工作条件配置图以及典型和扩展电源配置图, 血糖仪应用电路图和相应的材料清单.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