RAM Power-On Training With Error-Threshold Parameter Tuning

The patent applies preliminary action by performing a training operation before normal operation. The controller writes pattern data to the random access memory and reads it back multiple times (M times) to detect error bits. Based on the detected errors, the controller pre-adjusts operation parameters such as write leveling and read data eye settings. This preliminary adjustment ensures the random access memory is properly initialized and optimized before actual data processing begins, preventing malfunctions and data inconsistencies while maintaining performance improvements.

The patent applies partial or excessive action by performing the training operation a fixed number of times (M times) rather than continuously or indefinitely. This provides a balance between thoroughness and time efficiency. The value M is chosen to be sufficient to detect typical process variations and set appropriate operation parameters, but not so large as to cause excessive delay. This partial repetition ensures reliable parameter detection while controlling the time overhead during power-on initialization.