DocumentCode
2642093
Title
Design of an improved watchdog circuit for microcontroller-based systems
Author
Hefny, Mohamed S. ; Amer, Hassanein H.
Author_Institution
Dept. of Comput. Sci., American Univ., Cairo, Egypt
fYear
1999
fDate
22-24 Nov. 1999
Firstpage
165
Lastpage
168
Abstract
This paper presents an improved design for a watchdog circuit. Previously, watchdog timers detected refresh inputs that were slower than usual. If a failure causes the microcontroller to produce faster than usual refresh inputs, the watchdog will not detect it. This new design detects failures that produce faster than usual as well as slower than usual refresh inputs. This will greatly improve the reliability of the system protected by this new design.
Keywords
failure analysis; fault diagnosis; integrated circuit design; integrated circuit reliability; microcontrollers; timing circuits; failure detection; microcontroller failure; microcontroller-based systems; refresh input rate; refresh inputs; system reliability; watchdog circuit; watchdog circuit design; watchdog timers; Circuit faults; Computer science; Fault detection; Hardware; Microcontrollers; Protection; Pulse circuits; Redundancy; Software performance; Telecommunications;
fLanguage
English
Publisher
ieee
Conference_Titel
Microelectronics, 1999. ICM '99. The Eleventh International Conference on
Print_ISBN
0-7803-6643-3
Type
conf
DOI
10.1109/ICM.2000.884831
Filename
884831
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