JOURNAL OF COMPUTERS (JCP)
ISSN : 1796-203X
Volume : 3    Issue : 8    Date : August 2008

Design Overview Of Processor Based Implantable Pacemaker
Santosh Chede and Kishore Kulat
Page(s): 49-57
Full Text:
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Abstract
Implantable pacemaker is a battery operated real time embedded system, which includes
software/hardware codesign strategy. As it is placed within the heart by surgery, battery life is an
important constraint to extend device lifetime. In this paper, pacemaker’s functionalities like basic
pacing, pulse width, refractory period in VOO mode has been realized using ultralow power
processor MSP 430F1611 and IAR workbench. Software related instruction level instantaneous
current is measured and Current/Energy performance, battery longevity is tested. It is verified that,
change in pure cost and interinstruction cost (current/Energy) varies from 2.0 to 3.0 %. This
methodology seems to be an innovative concept in software related energy estimation of such
power critical real time system.

Index Terms
ultra low power, implantable pacemaker, real time system, current consumption, low power modes,
VOO mode