摘要：【中文】提供存储模块、存储系统和操作存储模块的方法。该存储模块包括安装在电路板上的半导体存储设备和安装在所述电路板上的控制设备。所述控制设备从外部设备接收命令、地址和时钟信号，并将所述命令、所述地址和所述时钟信号提供给所述半导体存储设备。所述控制设备在正常操作期间在隐藏训练模式下，通过将第一命令/地址和第一时钟信号发送到所述半导体存储设备中的至少一个半导体存储设备，并从所述至少一个半导体存储设备接收响应于所述第一命令/地址和所述第一时钟信号的第二命令/地址和第二时钟信号，对所述至少一个半导体存储设备执行命令/地址训练。 【EN】A memory module, a memory system, and a method of operating the memory module are provided. The memory module includes a semiconductor memory device mounted on a circuit board and a control device mounted on the circuit board. The control device receives a command, an address, and a clock signal from an external device and provides the command, the address, and the clock signal to the semiconductor memory device. The control device performs command/address training on at least one of the semiconductor memory devices by transmitting a first command/address and a first clock signal to the at least one semiconductor memory device and receiving a second command/address and a second clock signal from the at least one semiconductor memory device in response to the first command/address and the first clock signal in a hidden training mode during normal operation.