SSD XOR XOR-Based Scrambler/Descrambler for SSD Communication Protocols

摘要

An exemplary embodiment of descrambling and scrambling a memory channel includes executing a training mode. The training mode is executed on a memory device to search for XOR vectors used by a host system in order to scramble data. The search for the XOR vectors is performed by inputting all zero training data to a scrambling algorithm for all locations of memories of the memory device to generate training data, the scrambled training data is transmitted to the memory channel of the memory device, and the scrambled training data is the same as the XOR vectors corresponding to the locations of the memory. Further, the search includes receiving the scrambled training data of the memory channel by the memory device, and storing the scrambled training data as the XOR vectors for the corresponding locations of the memories. Further, the search includes receiving the scrambled data, and using a stored XOR vector for the location of a specific memory to descramble the scrambled data. The present invention provides a process of scrambling and descrambling channel data without requiring the knowledge or an inverse design of the knowledge of the scrambling algorithm provided by a host memory controller.