Memory controller, memory system, and method of operating memory controller

Disclosed are a memory controller, a memory system, and a method of operating the memory controller. The memory controller for controlling a memory operation of a memory device includes: an error correction code (ECC) circuit configured to detect an error of first read data read from the memory device and correct the error; an error type detection logic configured to write first write data to thememory device, compare second read data with the first write data, detect an error bit of the second read data based on a result of the comparing, and output information about an error type identifiedby the error bit; and a data patterning logic configured to change a bit pattern of input data to reduce an error of the second read data based on the information about the error type. 公开存储器控制器、存储器系统以及操作存储器控制器的方法。所述用于控制存储器装置的存储器操作的存储器控制器包括：纠错码(ECC)电路，被配置为：检测从存储器装置读取的第一读取数据的错误并纠正所述错误；错误类型检测逻辑，被配置为：将第一写入数据写入存储器装置，将第二读取数据与第一写入数据进行比较，基于比较的结果检测第二读取数据的错误位，并输出关于通过错误位而识别的错误类型的信息；以及数据图案化逻辑，被配置为：基于关于错误类型的信息改变输入数据的位图案，以减少第二读取数据的错误。