Digital Stethoscope  Favorite

The digital stethoscope is a step forward from its counterparts, with the capability of filtering and amplifying the signal. It connects to a LCD display to chart the results and have a graphic interface.

Improvement of listening to cardiac sounds helps a doctor make a more accurate diagnosis.

Freescale offers 8-bit and 32-bit ultra-low-power MCUs with the ability to drive an LCD display, ideal for the portability of digital stethoscopes and for more challenging applications such as fetal heart rate monitors.

Target Applications

Freescale Digital Stethoscope block diagram

Recommended Solutions

Products Features
Microcontrollers (MCU)
Kinetis K1x Baseline Microcontrollers (MCUs) 32-bit ultra-low-power, FPU, touch-sensing interface
Kinetis K3x Segment LCD Microcontrollers (MCUs) Low-power segment LCD controller, supports up to 320 segments, compatible with Kinetis K1x MCU family
Kinetis K4x USB & Segment LCD Microcontrollers (MCUs) MCU with ARM® Cortex™-M4 Core, 512K flash, USB, segment LCD
Kinetis K5x Measurement Microcontrollers (MCUs) Integrated OPAMPS, TRIAMPS, USB, Ethernet and segment LCD controller
KL1x: Kinetis KL1x - 48 MHz, General Purpose, Connectivity, Ultra-Low-Power MCUs Up to 256 KB flash with 64 byte flash cache and up to 32 KB RAM; Up to 16-bit ADC with configurable resolution, Compatible with KL2x, KL3x and KL4x
KL3x: Kinetis KL3x - 48 MHz, Segment LCD, Connectivity, High Integration, Ultra Low Power Microcontrollers (MCUs) Compatible with KL1x, KL2x and KL4x, Next-generation 32-bit ARM Cortex™-M0+ core: 2x more CoreMark/mA than the closest 8/16-bit architecture
KL4x: Kinetis KL4x - 48 MHz, USB, Segment LCD, Connectivity, High Integration, Ultra Low Power Microcontrollers (MCUs) Compatible with KL1x, KL2x and KL3x, Single-cycle fast I/O access port facilitates bit banging and software protocol emulation, maintaining an 8-bit “look and feel”
  • Freescale product longevity program offers up to 15-year availability for selected products
  • 8-bit MCUs offer low-power consumption to enable longer battery life
  • S08LL MCU provides additional superior LCD controller IP
  • Kinetis K50 family combines integrated measurement engine and high performance Cortex™ M4 core up to 100 MHz
  • Dedicated medical peripherals and healthcare connectivity stacks
  • USB, IEEE®802.15.4 and ZigBee® technology solutions for wireless interfaces
  • High end MPIs, video and graphics acceleration
  • Cost-effective, amplified, small form factor sensors with high sensitivity
  • Integrated analog portfolio that enables maximum battery life with advanced PMICs
  • ColdFire-embedded high-performance DSP functionality with integrated MAC