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- (electronics) A bit on a chip that can be used to disable one of the features of the chip if it proves faulty or negatively impacts performance.
- 2010, Ilya Wagner & Valeria Bertacco, Post-Silicon and Runtime Verification for Modern Processors, →ISBN, page 165:
- As an example, modules such as branch predictors and speculative execution units can be turned off with a variant of the “chicken bits”, control bits common to many design developments to control the activation of specific features.
- 2015, Erik Seligman, Tom Schubert, M V Achutha & Kiran Kumar, Formal Verification, →ISBN, page 237:
- Validation of a chicken bit can be challenging, because disabling a feature is often as intrusive in the code as the feature itself.
- 2015, Vincent Zimmer, Jiming Sun, & Marc Jones, Embedded Firmware Solutions: Development Best Practices, →ISBN, page 6:
- As a matter of fact, most of these chicken bits will never be documented, and a small portion of the chicken bits will be documented only when they are needed to work around a chip problem.