NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
On implementing self-checking microprocessorsA simple and general model of the interfaces and check circuits used for comparing and detecting faults in a pair of 16-bit processors is described, and problems encountered in the application of TI 9900 processors are discussed. The greatest incompatibility is found to lie between the rollback structures of the CPUs and the interface and check logic (ICL) model. The ICL model generates a reset when an error is detected, and a rollback is expected to occur when it is released. The TI 9900 requires a reset of minimum duration, and after release goes through an initialization cycle, obtains rollback parameters from fixed memory locations, and executes the rollback, consistent with the ICL. The ICL is relatively simple, having a complexity equivalent to fewer than 1000 gates.
Document ID
19830030691
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Rennels, D. A.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena; California, University Los Angeles, CA, United States)
Chandramouli, R.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
Computer Operations And Hardware
Meeting Information
Meeting: Mini and microcomputers in control and measurement; International Symposium
Location: San Francisco, CA
Start Date: May 20, 1981
End Date: May 22, 1981
Accession Number
83A11909
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available