Card and host apparatus

A memory system comprising:

• a host device;
• and
• a memory device including a memory core and a memory controller, the memory device connected to the host device,
• the host device configured to:
• send a first command to the memory device,
• the memory controller configured to:
• transmit, in response to the first command, a response of status data that is used to determine whether the memory device supports a termination process, the termination process including shifting into a state ready for a stop of power supply from the host device,
• the host device configured to:
• receive the response transmitted from the memory device in response to the first command, and
• send a function stop command to the memory device so that the memory device performs the termination process in response to the function stop command,
• the memory controller configured to:
• perform the termination process in response to the function stop command from the host device, and
• transmit a first signal indicative of a busy state while performing the termination process,
• the host device configured to:
• receive the first signal indicative of the busy state while performing the termination process,
• the memory controller configured to:
• notify the host device of completion of the busy state by transmitting a second signal indicative of a ready state when the memory device completes the termination process, and
• the host device configured to:
• receive the second signal indicative of the ready state.