Fault mapping apparatus for memory

Details Fault mapping apparatus for memory Fault mapping apparatus for memory

1991-01-07

1993-08-03

Beausoliel, Jr., Robert W.

Excavating

371 211, 371 51, 371 22, 3642463, G11C 2900

Patent

active

052336140

ABSTRACT:
A memory fault mapping apparatus detects faults generated in a memory array during on-line operation. As the memory array is randomly accessed, single bit error are detected, corrected, and mapped into an error memory. The errors may be mapped in an error memory having a memory location for each memory of the memory array or alternatively, by grouping memories together and when the errors generated by any one group exceeds a predetermined threshold of errors, testing only the memories in that group off-line. By grouping the memories a substantial reduction in the amount of error memory required can be achieved. A SEC/DED syndrome generator detects single and double bit errors, correcting the single bit errors while providing an indication of which memory generated the error. An error memory stores error counts for the memory array, each error count indicating the number of errors for a specific memory or a group of memories. The error counts are incremented by loading the error count into a counter for incrementing then writing the incremented error count back to the error memory location from which it was read.

REFERENCES:
patent: 4051460 (1977-09-01), Yamada et al.
patent: 4479214 (1984-10-01), Ryan
patent: 4506364 (1985-03-01), Arichelmann, Jr. et al.
patent: 4601031 (1986-07-01), Walker et al.
patent: 4736373 (1988-04-01), Schmidt

Affiliated with

Also associated with

Rating

Fault mapping apparatus for memory does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fault mapping apparatus for memory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fault mapping apparatus for memory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2277813