Medical Applications User Guide (pdf) - Freescale Semiconductor

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Home Portable Medical MMA845xQ Accelerometers Freescale’s Xtrinsic accelerometer MMA845xQ family offers extremely low power and pin compatibility with a broad range of resolution (14-, 12- and 10-bit) and embedded features for configurable, accurate motion analysis. To operate with extremely low power, the MMA845xQ accelerometers have six userconfigurable sample rates that can be set over a wide range of 1.5 to 800 Hz. The power scheme contains four different power modes from high resolution to low power, offering best-in-class savings in supply current and extremely high resolution for very small motion detection. Features • Low-power current consumption o Off mode: 50 nA o Standby mode: 2 uA o Active mode: 6-166 uA • Low-voltage operation: 1.95-3.6 volts • Embedded features include: o Freefall detection o Orientation detection o Tap detect o Shake detect o Auto-wake sleep MMA9553L Intelligent Motion Sensing Platform Freescale’s Xtrinsic MMA9550L intelligent motion sensing platform is an industry first with integration of a MEMS accelerometer, a 32-bit embedded ColdFire MCU, flash memory and a dedicated architecture to manage other sensors. Freescale has now expanded the MMA9550L offering with the MMA9553L to enable pedometer functionality. The MMA9553L intelligent motion sensing platform performs activity monitoring beyond step counting. This entails recognition of motion such as rest, walking, jogging and running. Figure 8-3: MMA845xQ Block Diagram MMA845xQ Block Diagram Vdd VddIO VSS X-axis Transducer Y-axis Transducer Z-axis Transducer 32 Data Point Configurable FIFO Buffer with Watermark Freefall and Motion Detection C to V Converter Configurable Embedded DSP Functions Transient Detection (i.e., fast motion, jolt) Enhanced Orientation with Hysteresis and Z-lockout Shake Detection through Motion Threshold 46 Medical Applications User Guide INT1 INT2 Single, Double & Directional Tap Detection Auto-Wake/Auto-Sleep Configurable with debounce counter and multiple motion interrupts for control MODE Options Low Power Low Noise + Power High Resolution Normal ACTIVE Mode WAKE Internal OSC Auto-WAKE/SLEEP Features • Communication protocols: I2C/SPI • Low-voltage operation: 1.71 V to 1.89 V • Embedded smart FIFO for data processing while apps processor is asleep • Configurable sample rate: 1–1024 samples/sec • Auto-wake monitors change in activity/ position • Embedded features include: o Orientation detection o Single, Double and Directional Tap detect o Single, Double and Directional Shake o Threshold detection o Linear and rotational freefall o Flick detection o Tilt angle Clock GEN 14-bit ADC ACTIVE Mode SLEEP Embedded DSP Functions 8.4 User Interface I 2 C MODE Options Low Power Low Noise + Power High Resolution Normal SDA SCL The user interface is an essential part in the activity monitor development. It must be simple and intuitive, as well as attractive for the user. The use of graphic displays makes the activity monitor easier and more intuitive to use, and it also adds aesthetics to the design. MCUs with External Bus Interface (EBI) reduce the processor’s load allowing for better quality graphics with reduced processor intervention. The touch-sensing interfaces (TSI) make the design an attractive and functional application by removing the need for mechanic buttons. In addition, the TSIs are easier to clean and are more hygienic.
Xtrinsic Touch-Sensing Software Xtrinsic Touch-Sensing Software (TSS) transforms any standard MCU into a touch sensor with the ability to manage multiple configurations of touchpads, sliders, rotary positions and mechanical keys, all while maintaining standard MCU functionality. 8.5 Reference Designs Freescale provides ready-to-develop applications intended to reduce the development time and, therefore, time to market and costs. The following documents include useful information in the development of activity monitor applications: DRM125 Activity Monitor AN4323 Freescale Solutions for Electrocardiograph and Heart Rate Monitor Applications AN4519 Data Manipulation and Basic Settings of the MPL3115A2 Command Line Interface Driver Code S08MM: Flexis 8-bit MCUs The 9S08MM128/64/32 provides ultralow-power operation, USB connectivity, graphic display support and unparalleled measurement accuracy, all in a single 8-bit MCU, allowing device designers to create more fully featured products at a lower cost. It is ideal for applications requiring a significant amount of precision analog. The 9S08MM128/64/32 is part of Freescale’s Flexis MCU series. Figure 8-4: Xtrinsic MMA9553L Intelligent Motion Sensing Block Diagram Xtrinsic MMA9550L Block Diagram Power Management Inertial Sensor MMA9550L Sensor Sensing Software V1 ColdFire 32-Bit Processor 16K Flash, 8K User Programmable, 2K RAM, 1K User RAM Connectivity: I2C/SPI Gyro Pressure Touch Magnetics Figure Figure 9-10: 8-5: MC9S08MM128 MC9S08MM128 Block Block Diagram Diagram 2x OPAMP 2x TRIAMP PDB MCG VREF TOD PRACMP CMT 2 x 4-ch. TPM with PWM 2 x SCI 2 x KBI 2 x SPI 8-bit 9S08 48 MHz Core Home Portable Medical Customer/Third-Party Innovation Applications Software Libraries Basic OS Drivers Up to 12 Sensor Components Up to 68 GPIO 16-bit SAR ADC I2 12-bit DAC LVI C USB Device Bootloader 128 KB Flash 12 KB SRAM USB ROM freescale .com/medical 47
Page 1 and 2: Medical Applications User Guide TM
Page 3 and 4: freescale.com/medical 3 Introductio
Page 5 and 6: Introduction 1.1 Freescale Offers T
Page 7 and 8: Monebo Kenetic ECG Algorithms Free
Page 9 and 10: Home Portable Medical 2.1 Introduct
Page 11 and 12: 3.2 Home Health Hub (HHH) Reference
Page 13 and 14: 3.3 Power Management Every design n
Page 15 and 16: MC34704 The MC34704 is a multi-chan
Page 17 and 18: 3.7 How it Works The external capac
Page 19 and 20: eliably monitor and manage non-crit
Page 21 and 22: 3.19 Standard Medical USB Communica
Page 23 and 24: Freescale has developed sample code
Page 25 and 26: 4.2 Heartbeat Detection The heartbe
Page 27 and 28: 4.6 Blood Pressure Monitor Referenc
Page 29 and 30: MCF51MM: Flexis 32-bit ColdFire V1
Page 31 and 32: Heart Rate Monitor 5.1 Introduction
Page 33 and 34: Instrumentation amplifier requireme
Page 35 and 36: 6.2 Test Strip A test strip consist
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Page 41 and 42: 7.2 Signal Acquisition This applica
Page 43 and 44: AN4327 Pulse Oximeter Fundamentals
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Page 75 and 76: Vital Signs 14.1 Introduction A vit
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The depth in color used in the fina
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significant amount of precision ana
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All the devices featured are pin co
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Summary Summary Applications Freesc
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Appendix Digital Signal Processing
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Freescale Technologies • ColdFire
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ADC Analog-to-digital converters (A
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Medical Applications User Guide (pdf) - Freescale Semiconductor

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