Registers – Transfer mechanism – Traveling pawl
Patent
1975-08-04
1976-03-16
Dildine, Jr., R. Stephen
Registers
Transfer mechanism
Traveling pawl
235153AE, 340174ED, G11C 2900, H03K 1334, G06F 1110
Patent
active
039448002
ABSTRACT:
A diagnostic system is disclosed for detecting malfunctions in the access circuitry utilized to control the reading, writing, and refreshing of a plurality of semiconductor memory modules. More specifically, a pair of access circuits are provided for each module with each access circuit only controlling the accessing of predetermined bits of each word stored in that module. During read or write operations, the output signals generated by each of the two access circuits for application to the memory elements in that module are "compared" to ensure that the memory elements are being properly accessed. During refresh operations, the outputs of each pair of access circuits are also "matched" to ensure the integrity of the refresh operation.
REFERENCES:
patent: 3599146 (1971-08-01), Weisbecker
patent: 3814922 (1974-06-01), Nibby et al.
Beck Frank Valentine
Peterson David Cartwright
Prell Edward Myron
Quin Terrence Thomas
Bell Telephone Laboratories Incorporated
Dildine, Jr. R. Stephen
Falk J. W.
Landis M. S.
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