Bluetooth Memory ECC for Erased-Word Data Integrity

The patent applies preliminary action by pre-calculating and storing the binary code of the erased word (W_E) and its associated erased redundancy code (RC_E) in the memory controller before actual data operations. When a write operation occurs, the controller checks if the user data matches the pre-stored erased word pattern, and if so, directly uses the pre-computed RC_E value, avoiding complex real-time ECC calculations and reducing operational complexity while maintaining data integrity.

The patent changes the parameter approach by transitioning from traditional ECC methods that calculate redundancy codes for every write operation to a pattern-based approach where the erased word pattern is recognized and matched against pre-stored reference values. This parameter change allows the system to switch between different operational modes (pattern match vs. full ECC calculation) based on the data characteristics, optimizing both reliability and complexity management.

The patent implements preliminary action by pre-computing and storing the erased redundancy code (RC_E) associated with the erased word pattern (W_E) in the memory controller before any write operations occur. During write operations, the controller first checks if the user data matches the pre-stored erased word pattern, and if it does, directly uses the pre-computed RC_E value without performing full ECC calculations, thereby significantly reducing processing time while maintaining data integrity.

The patent applies partial action by implementing a two-stage processing approach: first checking for the specific erased word pattern (partial check), and only performing full ECC calculations if the pattern doesn't match. This partial verification approach reduces the average processing time by handling the common case (erased word patterns) more efficiently, while still maintaining complete data integrity verification for all cases.