It possesses the address decoder in order address to appoint the redundant memory territory, one or hub module in order to connect plural memory chips

摘要

This invention one or regards the hub module in order to connect plural memory chips. This hub module address the address input section which is connected to the address bus in order to receive the address of the memory territory which is appointed, has with the address output section which is connected to another address bus, in order address to appoint one among the memory chips which are connected making use of the address which is given to the address input section, or, possesses the address decoder unit in order to give the address which is given to the address output section. As for feature of this invention, one which is connected or when the defectiveness is detected to the memory territory of plural memory chips, address it is not the memory territory which is appointed and in order address to appoint the redundant memory territory, address decoder unit is the point which has possessed redundant unit.