Low-power SRAM E-fuse repair methodology

Details Low-power SRAM E-fuse repair methodology Low-power SRAM E-fuse repair methodology

2006-12-19

2006-12-19

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S005110, C714S054000, C714S710000, C714S718000, C365S200000, C365S201000, C365S226000, C365S228000, C713S324000

Reexamination Certificate

active

07152187

ABSTRACT:
A low power E-fuse repair methodology substantially removes system latency during memory and/or E-fuse farm module power-down in a device that employs E-fuse farm technology. The method maintains power to the repair registers and minimal control logic in the memories, while all other circuitry can be either placed in a low power data retention mode, or completely powered off. There is no need to rescan the repair data from the E-fuse farm after one or more memories are powered back up. This provides dynamic power savings since there is no longer any need to idle the system to reload repair data. Since the E-fuse farm can be powered down after initial system power-up and repair data is loaded into the memories, there is also a significant leakage power savings.

REFERENCES:
patent: 6457108 (2002-09-01), Hsu et al.
patent: 6768694 (2004-07-01), Anand et al.
patent: 2003/0154437 (2003-08-01), Chih
patent: 2005/0138513 (2005-06-01), Mondal et al.

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