Buffer device, and memory module and memory system each including the buffer device

Abstract

A buffer device, and a memory module and a memory system each including the buffer device are provided. The buffer device includes a structure for performing training operations for a plurality of memory devices to ensure data reliability. A memory controller is configured to control a memory operation for a plurality of memory devices. A memory module includes the plurality of memory devices anda buffer device connected between the memory devices and the memory controller. Training operations for the memory devices to be performed by the buffer device including a training block with a signaldelay circuit, and the memory controller performs the training operations by controlling the training block.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to Korean Patent Application No. 10-2017-0117232 filed with the Korean Intellectual Property Office on September 13, 2017, the disclosure of which is incorporated herein by reference. technical field [0003] The inventive concept relates to a memory system performing a training operation on a plurality of memory devices, and more particularly, to a buffer device supporting a training operation on a plurality of memory devices, and a memory module and a memory system each including the buffer device. Background technique [0004] Due to the development of memory technology, memory systems for writing and reading large amounts of data are constantly being developed. In this case, a plurality of memory devices are connected to a memory controller included in the memory system in order to control memory operations including write operations and read operations. However, in a structure in ...

AI Technical Summary

Problems solved by technology

However, in a structure in which multiple memory devices are connected to one memory controller, the memory controller has a high output impedance, and therefore, the signal output from the memory controller is insufficient to reach multiple memory devices

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