In a memory module including a plurality of DRAM chips which transmit/receive a system data signal with a predetermined data width and at a transfer rate and which transmit/receive an internal data signal having a larger data width and a lower transfer rate as compared with the system data signal, the...http://www.google.fr/patents/US7965531?utm_source=gb-gplus-shareBrevet US7965531 - Memory module and memory device
