Nonvolatile memory module, memory system including nonvolatile memory module and controlling method of nonvolatile memory module

The present invention relates to a memory system. The memory system of the present invention comprises a non-volatile memory module including a plurality of non-volatile memory devices and a memory module controller for controlling the non-volatile memory module. At least two non-volatile memory devices among the plurality of non-volatile memory devices store serial presence detect (SPD) information. The memory module controller reads the SPD information from the non-volatile memory module, and sets a communication mode with the non-volatile memory module based on the SPD information read.