| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a memory system, which stably operates in a high frequency, has a topology not requiring consideration for an effect caused by a radiation noise, and has a varied wiring topology for data and command address signals. <P>SOLUTION: In the memory system comprising a plurality modules, each of which is provided with a plurality of DRAMs, each of the DRAMs and a memory controller (MC) is connected with a data wiring and clock wiring. The clock wiring has a specific topology for each module in the manner similar to a command address wiring. The data wiring, also, has a topology for connecting a corresponding DRAM on each module. As a result, a clock and command address wiring has a topology, which is shorter than that of the clock wiring. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
