MEMORY DEVICE AND OPERATING METHOD OF MEMORY DEVICE AND HOST DEVICE

The invention provides a memory device and an operation method of the memory device and a host device. The method of operating a memory device includes: receiving a command for requesting execution of an eye opening monitor (EOM) operation from a host device; receiving pattern data including data and non-data from a host device; performing an EOM operation, the EOM operation performing error counting corresponding to the data and not performing error counting on non-data; and transmitting an EOM response signal including the error count result to the host device. 提供了存储器装置以及存储器装置和主机装置的操作方法。所述操作存储器装置的方法包括：从主机装置接收用于请求眼图张开度监测器(EOM)操作执行的命令；从主机装置接收包括数据和非数据的模式数据；执行EOM操作，EOM操作执行与数据对应的错误计数，并且不对非数据执行错误计数；以及将包括错误计数结果的EOM响应信号发送到主机装置。