Freescale Semiconductor MED-EKG User guide
MED-EKG
User Manual
Rev. 1.0
Freescale Semiconductor Inc.
Contents
1 Overview ...................................................................................................................................................... 3
2 Reference Documents .............................................................................................................................. 4
3 Hardware Features ................................................................................................................................... 4
3.1 System Power ....................................................................................................................................................................... 4
3.2 Debug Interface ................................................................................................................................................................... 4
3.3 Medical Connector .............................................................................................................................................................. 4
3.4 Mechanical Form Factor .................................................................................................................................................. 5
3.5 External Electrodes Connector ..................................................................................................................................... 5
3.6 Slider Electrodes ................................................................................................................................................................. 6
4 Jumper Table .............................................................................................................................................. 6
MED-EKG User Manual Page 2 of 7
MC56F8006
Medical Connector
JTAG/ONCE
IIC bus
INA
connector
amplifier
configur
ation)
filter
amplifier
filter
filter
PWM
Internal
MM
ADC
MM
1 Overview
The Medical EKG Module (MED-EKG) is a low cost development board that allows users to rapidly
prototype electrocardiogram (EKG/ECG) applications. Users can choose to develop EKG/ECG
applications using the external analog components or by using the Flexis MM microcontroller’s on-chip
analog modules or a mixture of both. MED-EKG is designed to work with the TWR-MCF51MM module
and TWR-S08MM128 module. The EKG/ECG software demonstration and step-by-step lab guide is
available in the both the Tower System TWR-MCF51MM-KIT and TWR-S08MM128-KIT or from
www.freescale.com
NOTE: TWR-MCF51MM-KIT features the 32-bit MCF51MM256 microcontroller and the TWRS08MM128-KIT features the 8-bit MC9S08MM128 microcontroller. Peripherals between these two 32bit and 8-bit MCUs are either identical or compatible; they are called the Flexis devices.
The following list summarizes the features of the MED-EKG board:
• Freescale Tower System compliant and small form factor
• External connector to TWR-S08MM128 and TWR-MCF51MM MCU modules
• Includes the MC56F8006 DSC used for signal conditioning
• Electrodes embedded in development board for easy EKG signal detection using fingertips
• Open connector for any type of EKG electrodes for additional precision
• JTAG-ONCE connector for DSC programming
• Different jumper configurations to allow various signal conditions
• Low power
Figure 1. MED-EKG Block Diagram
Integrated
Electrodes
(left, right and
reference
sliders)
External
electrodes
External
Compensation
Analog
band-pass
filter
Low-pass
External
14-pin header
16-bit Digital
Signal Controller
16-bitADC
amplifiers
In/Out
Reference
voltage
Internal MM
amplifiers (INA
Analog
band-pass
filter
Internal
MM
amplifier
Analog
notch
External
Low-pass
12-bit DAC
Compensation
Freescale Silicon External Connectors Interface Circuits Power
Jumper configurations INA Instrumentation Amplifier
MED-EKG User Manual Page 3 of 7
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