Memory device and memory system including the same

A memory system comprising:

• a memory device comprising a plurality of channels, a physical (PHY) interface and a direct access (DA) interface;
• a memory controller comprising a physical (PHY) interface suitable for transmitting control signals to the plurality of channels, and exchanging data through the plurality of channels;
• and
• an interposer suitable for transferring control signals and data between the memory controller and the memory device, wherein the PHY interface of the memory device is suitable for receiving the control signals transmitted from the memory controller and exchanging data with the memory controller;
• and the DA interface is suitable for receiving control signals through a selected one of the channels, among the control signals received through the PHY interface of the memory device, and receiving a part of the data through the selected channel among the data exchanged through the PHY interface of the memory device, and outputting the received control signals and the received part of the data, in a monitoring mode;
• and
• wherein the interposer transfers the control signals and data between the PHY interface of the memory controller and the PHY interface of the memory device.

A memory device comprising:

• a plurality of first control signal interfaces suitable for receiving control signals from a host;
• a plurality of first data interfaces respectively corresponding to the plurality of first control signal interfaces, and suitable for exchanging data and data strobe signals with the host;
• a second control signal interface suitable for receiving control signals through a selected one of the first control signal interfaces and outputting the received control signals, in a monitoring mode;
• and
• a second data interface suitable for receiving a part of the data and data strobe signals exchanged through a selected one of the first data interfaces, and outputting the received part of the data and data strobe signals, in the monitoring mode.