Medical Applications User Guide (pdf) - Freescale Semiconductor

More documents

Recommendations

Info

Diagnostic and Therapy Devices 16.4 Signal Conditioning Signal conditioning can be implemented using a band-pass filter to reject noise. Using an active filter, the signal can be conditioned to determine values. For details about filter design, refer to the Appendix. The signal at the output of the band-pass filter is sent to a phase-locked loop to generate a frequency-dependent voltage. The phaselocked loop must be configured so that the frequency of the look-in range matches the band-pass filter bandwidth. This signal is applied to an input of the analog-to-digital converter embedded on the MCU. 16.5 LCD Display The MCU is responsible for processing the information acquired according to an algorithm and displaying the data on an LCD screen. Freescale provides 8-bit MCUs with embedded LCD controllers such as the MC9S08LL, MC9RS08LE, MC9RS08LA and MC9S08LC families. Ultra-low-power MCUs with LCD drivers are in the LL family. On the high end, consider Kinetis or Vybrid MCUs. For more information about LCD devices and connections, see Chapter 6, Blood Glucose Meter. For information about a digital stethoscope reference design, download DRM132 Medical Stethoscope Design Reference Manual. K50 Measurement MCUs The K50 MCU family is pin, peripheral and software compatible with other Kinetis MCUs and provides designers with an analog measurement engine consisting of integrated operational and transimpedance amplifiers and high-resolution ADC and DAC modules. The family also features IEEE 1588 Ethernet and hardware encryption, full-speed USB 2.0 On-The-Go with device charger detect capability and a flexible low-power segment LCD controller with support for up to 320 Figure 16-4: Ultrasonic Probe Elements Block Diagram Figure 15-5: Ultrasonic Probe Elements Block Diagram Oscillator Phase-Locked Loop to MCU ADC input Amplifier Band-Pass Filter Instrumentation Amplifier Probe Electrical Protection Amplifier Signal Conditioning 86 Medical Applications User Guide Current Limiter Figure Figure 15-2: 16-5: Doppler Doppler Effect Effect Example Example Waves emitted by a static object Electrical Isolation Waves emitted by a moving object Transmitter Transducer Receiver Transducer Signal sent Signal bounced
segments. Devices start from 128 KB of flash in 64-pin QFN packages extending up to 512 KB in a 144-pin MAPBGA package. Key Features The Kinetis K50 MCU has the next features and peripherals in its integrated measurement engine: • Ultra-low-power operation • 2x OPAMP • 2x TRIAMP • 2x 12-bit DAC • 2x 16-bit SAR ADC, up to 31 channels with programmable gain amplifiers (PGA) • Programmable Delay Block (PDB) • I2C • USB connectivity • ARM Cortex-M4 core with DSP (Digital Signal Processor) instructions MCF51MM: Flexis 32-bit ColdFire V1 MCUs The MCF51MM256/128 provides ultralow-power operation, USB connectivity, graphic display support and unparalleled measurement accuracy, all in a single 32-bit MCU, allowing designers to create more fully featured products at lower cost. The MCF51MM256/128 is ideal for medical applications or other applications requiring a significant amount of precision analog such as instrumentation and industrial control. The MCF51MM256/128 is part of the Freescale Flexis MCU series. Features: • ColdFire V1 core delivering a 50 MHz core speed and 25 MHz bus speed • Up to 256 KB flash and 32 KB SRAM • Low-power stop 2 current: 500 nA (32 KB of active SRAM) • 2 x general purpose opamps • 2 x transimpedance amplifiers • 16-bit SAR high resolution analog-to-digital converter (ADC) • Analog Comparator with 5-bit digital-toanalog converter (DAC) • Internal voltage reference • USB – device/host/on-the-go controller Figure 16-6: Kinetis K50 Family Block Diagram Figure 15-6: Kinetis K50 Family Security and Integrity Cyclic Redundancy Check (CRC) Random Number Generator Cryptographic Acceleration Unit (CAU) Core ARM ® Cortex-M4 72/100 MHz Debug Interfaces Interrupt Controller Standard Feature Diagnostic and Therapy Devices System Memories Internal and External Watchdogs Memory Protection Unit (MPU) Xtrinsic Low-Power Touch-Sensing Interface Segment LCD Controller freescale .com/medical 87 DSP Analog 16-bit ADC PGA Analog Comparator 6-bit DAC 12-bit DAC Voltage Reference OPAMP TRIAMP DMA Low-Leakage Wake-Up Unit Timers FlexTimer Carrier Modulator Transmitter Programmable Delay Block Periodic Interrupt Timer Low-Power Timer Independent Real-Time Clock (IRTC) IEEE ® 1588 Timer Optional Feature Figure 16-7: MCF51MM256 Block Diagram Figure 15-7: MCF51MM256 Block Diagram 2x OPAMP 2x TRIAMP PDB MCG Program Flash (128 to 512 KB) FlexMemory (32 to 256 KB) (2 to 4 KB EE) Serial Programming Interface (EZPort) SRAM (32 to 128 KB) External Bus Interface (FlexBus) Clocks Phase-Locked Loop Frequency- Locked Loop Low/High- Frequency Oscillators Internal Reference Clocks Communication Interfaces HMI I 2 C UART (ISO 7816) SPI IEEE 1588 Ethernet MAC VREF TOD PRACMP CMT 2 x 4-ch. TPM with PWM 2 x SPI 2 x KBI 2 x SCI I 2 S Secure Digital Host Controller (SDHC) USB OTG (LS/FS) USB Charger Detect (DCD) USB Voltage Regulator 16-bit SAR ADC I2 12-bit DAC LVI C 32-bit V1 ColdFire 50 MHz Core with MAC GPIO Up to 68 GPIO/ 16 RGPIO MiniBus External USB Device/Host/ OTG Bootloader 256 KB 32 KB SRAM USB ROM
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
Page 37 and 38: fully featured products at lower co
Page 39 and 40: Freescale’s Xtrinsic acceleromete
Page 41 and 42: 7.2 Signal Acquisition This applica
Page 43 and 44: AN4327 Pulse Oximeter Fundamentals
Page 45 and 46: 8.2 Electrocardiography (ECG) Acqui
Page 47 and 48: Xtrinsic Touch-Sensing Software Xtr
Page 49 and 50: • Internal voltage reference •
Page 51 and 52: 9.2 Microphone Amplifier The microp
Page 53 and 54: 9.5 Digital Signal Processor The di
Page 55 and 56: Diagnostic and Therapy Devices 10.1
Page 57 and 58: 10.4 Filtering ECG The ECG has thre
Page 59 and 60: Features: • ColdFire V1 core deli
Page 61 and 62: The eMAC improvements target three
Page 63 and 64: 11.2 Circuit for Capacitive Dischar
Page 65 and 66: 12.2 System Sensors Figure 12-1: Ve
Page 67 and 68: • i.MX Processors The most versat
Page 69 and 70: MPX230xDT1: High Volume Pressure Se
Page 71 and 72: S08MM: Flexis 8-bit MCUs The 9S08MM
Page 73 and 74: 13.2 Brief Theory As mentioned in C
Page 75 and 76: Vital Signs 14.1 Introduction A vit
Page 77 and 78: 14.6 Motor Control with Freescale D
Page 79 and 80: State-of-the-art technology—inclu
Page 81 and 82: 15.5 Communication Interfaces USB P
Page 83 and 84: 15.7 Multimedia Applications with i
Page 85: 16.2 Ultrasonic Probe The ultrasoni
Page 89 and 90: Powered Patient Bed 17.1 Introducti
Page 91 and 92: accelerometer is required. The Free
Page 93 and 94: Table 17-1. Freescale Technologies
Page 95 and 96: 18.2 Ultrasound Ultrasound is a non
Page 97 and 98: The depth in color used in the fina
Page 99 and 100: significant amount of precision ana
Page 101 and 102: All the devices featured are pin co
Page 103 and 104: Summary Summary Applications Freesc
Page 105 and 106: Appendix Digital Signal Processing
Page 107 and 108: Freescale Technologies • ColdFire
Page 109 and 110: ADC Analog-to-digital converters (A
Page 111 and 112: freescale .com/medical
show all

Medical Applications User Guide (pdf) - Freescale Semiconductor

Create successful ePaper yourself

Delete template?

Save as template?