TOWER SYSTEM
TOWER SYSTEM
Introduction
This lab is a step-by-step guide to run
the EKG demo. The EKG demo uses
the S08MM128 on-chip analog modules
(TRIAMPs, OPAMPs, DAC and ADC)
along with noise filters to condition the
EKG signal. The EKG signal condition
includes the following stages:
1) Instrumentation amplification using on-chip
TRIAMP1, TRIAMP2 and OPAMP1
2) Band pass filtering
3) Amplification using on-chip OPAMP2
programmable gain
4) Notch filtering
5) Amplification using an off-chip OPAMP
6) Automatic baseline compensation
using on-chip 12-bit DAC
7) Digital filtering with the pre-programmed
MC56F8006 Freescale DSC
After digital filtering tuning, the end results
are sent from DSC via I
2
C protocol back
to S08MM128. The S08MM128 then uses
the Freescale USB stack to forward the
results to the computer, which are then
displayed on the Freescale MED-EKG
graphical user interface (GUI).
NOTE:
The official marking for S08MM devices is MC9S08MM.
In this document, the MC9 prefix is omitted for simple
referencing.
NOTE:
Please refer to the MED-EKG schematic for circuit
detail. The schematic is included in the DVD. Stages 6 and 7
may not be necessary in your own EKG application. They are
included in the MED-EKG to allow you to use off-chip devices
to help prototyping.
Required materials:
• TWR-S08MM128-KIT Quick Start Guide
• Tower System—Built according to
TWR-S08MM128-KIT Quick Start Guide
• MED-EKG module
• Two mini-USB cables—One for TWR-
SER and one for TWR-S08MM128
• LAB1.zip—Located under the “Software”
tab, in the “Labs” section in the DVD.
Follow the lab guide for installation
• Computer installed with:
o CodeWarrior for Microcontrollers v6.3
o Latest S08MM128 service pack
o Freescale MED-EKG GUI (installation
file, MED_EKG_GUI.exe, included in
LAB1.zip)
o Microsoft .NET Framework 2.0 or 3.5
(required to run MED-EKG GUI)
NOTE:
This lab was tested with Windows
®
XP, Vista and
Windows 7.
