Memory module and memory system comprising the same

The present invention discloses a memory module and a memory system having the same. The module receives a plurality of groups each packet command, and each having a plurality of groups each of a plurality of groups of the memory for generating a read-data and the plurality of group memory unit is a packet command, command signals and address the generation and the write operation in the event of the write data of two or more groups are included in a packet command to, and transmits through the write / read data line to write data of two or more groups, write / read data at the time of the read operation receiving the read data of two or more groups that are transmitted via the lines and the read data interface unit for generating a read data through the line, and the common receive the command signal and the address, and second write data in more than one group at the time of the write operation receive the write data in the corresponding groups, respectively, at the time of the read operation of two or more It is composed of a group of read data of the group corresponding to the read data from the first memory into two or more transmitting, respectively.