| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-availability function and an improved disconnection together with a memory configuration for minimizing the capacitive load of board trace while suppressing the influence of capacitive load by a memory device at a minimum. SOLUTION: This memory is configured with a memory controller, a signal central switch, a data bus electrically coupled to the memory controller and the central switch and plural N memory modules. In this case, each of plural N memory modules is radially connected to the central switch by a correspondent memory modules bus. The central switch is physically located on a memory board and made effective for providing a point-to-point bus between the memory controller and a memory device on the memory module in the combination with the parallel connection of the memory module. For use with a high- availability fault allowance system, the memory modules are units exchangeable on the job site and are electrically disconnected.
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