soft error


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soft error

[′sȯft ′er·ər]
(computer science)
An error that occurs in automatic operations but does not recur when the operation is attempted a second time.

soft error

A temporary disruption of a memory cell that causes its content to change from 0 to 1 or 1 to 0. The cause may be radioactive decay within the chip itself or cosmic rays from outer space. Without error correction built into the hardware, a soft error within a string of data may go unnoticed, unless financial amounts are involved. If an instruction resides in the faulty cell, or if the cell contains codes and settings used by the software, the program may crash or produce erroneous results. The remedy for soft errors is a cold boot. Contrast with hard error. See cold boot, parity checking and ECC memory.
References in periodicals archive ?
Also, in most silicon chips, large parts of the circuit are inactive at any given moment; even if a soft error occurs, it may be ignored or overwritten before causing a problem.
Soft error protection design techniques for logic blocks add extra silicon overhead by increasing the size of silicon by 100 percent or more and requiring extra power of the same order of magnitude.
The forthcoming SRAMs are the new series of Advanced LPSRAM and provide high reliability equivalent to that of Renesas' existing SRAM products adopting a 150 nm process, including soft error (Note 1) free and latch-up (Note 2)) free.
The researchers present recent results in package circuit co-design, interconnects and power grids, parametric variations, analog and RF testing, low power circuits, lithography and OPC, DFM process, and modeling for soft error reliability.
Two tutorials describe soft error rate testing of deep-submicron integrated circuits, and new techniques for accessing embedded instrumentation.