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US 5,495,491 AGranted
System using a memory controller controlling an error correction means to detect and correct memory errors when and over a time interval indicated by registers in the memory controller
AssigneeMotorola, Inc.
InventorsRalph E. Snowden, Douglas R. Kraft, Eugene H. Gruender, Jr.
Life of this patent
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Abstract
A burst error scrubbing system and method consecutively detects and corrects errors in all of memory, beginning with data stored at the first address of memory and continuing until data stored at the last address of memory is read, corrected and written back to memory. Burst error scrubbing is not performed during a refresh cycle but instead is programmable so that the burst scrubbing can be performed at a specific time interval.
Claims1
A system for consecutively detecting and correcting memory errors, said system comprising:
- memory for storing data;
- error correction means, connected to said memory, for reading, correcting and writing said data stored in said memory;
- a memory controller connected to said error correction means and said memory to control said error correction means to successively read, correct and write the data stored in each memory location in said memory;
- said memory controller having an interval timer register for programming a time interval over which said error correction means is to successively read, correct and write the data stored in each memory location in said memory;
- and
- said memory controller having a scrub control register for indicating to said error correction means that said error correction means is to successively read, correct and write the data stored in each memory location in said memory.
3 more elements
Dependencies are inferred from the claim text.