A data processing system may include: a host; and a memory system including a plurality of memory units and a controller coupled to the plurality of memory units. The controller may include a memory manager suitable for acquiring characteristic data from serial presence detect (SPD) components in the plurality of memory units when power is supplied, providing the characteristic data to the host, setting an operation mode of each of the plurality of memory units based on the characteristic data, and performing memory training, and the host may perform interface training with the controller.