Device and method for configuring a cache tag in accordance...

Details Device and method for configuring a cache tag in accordance... Device and method for configuring a cache tag in accordance...

2005-08-02

2005-08-02

Bragdon, Reginald G. (Department: 2188)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C711S104000, C711S118000, C711S105000

Reexamination Certificate

active

06925579

ABSTRACT:
In a cache tag integrated on an SRAM with a memory cache, laser fuses are programmed to indicate which, if any, tag subarrays in the cache tag are not functioning properly. In addition, the burst length of the SRAM is increased to reduce the number of tag subarrays necessary for operation of the cache tag so any nonfunctional tag subarrays are no longer necessary. In accordance with the indications from the programmed laser fuses and the increased burst length, logic circuitry disables any nonfunctional tag subarrays, leaving only functional tag subarrays to provide tag functionality for the memory cache. As a result, an SRAM that is typically scrapped as a result of nonfunctional tag subarrays can, instead, be recovered for sale and subsequent use.

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