Memory system and operating method of the memory system

1. A memory system comprising:

a memory device including an interface circuit and a semiconductor memory; and

a controller configured to generate a command for controlling the memory device,

wherein the interface circuit is configured to:

receive the command from the controller;

determine whether the command is for the semiconductor memory or the interface circuit; and

when it is determined that the command is for the interface circuit, perform a blocking operation to block transfer of the command between the interface circuit and the semiconductor memory and perform an internal operation of the interface circuit, and

wherein the internal operation includes one of a signal controlling operation, a training operation, a read operation, an on-die termination operation, a ZQ calibration operation, or a driving force control operation.

2. The memory system according to claim 1 , wherein the signal controlling operation includes correcting a duty cycle of a control signal.

3. The memory system according to claim 2 , wherein the operation of correcting the duty cycle of the control signal includes:

receiving the control signal including a read enable signal or a data strobe signal from the controller; and

delaying a phase of the control signal to generate a corrected control signal for the semiconductor memory.

4. The memory system according to claim 1 , wherein the training operation includes a write training operation and a read training operation.

5. The memory system according to claim 4 , wherein the interface circuit controls time of data transfer between the interface circuit and the controller or the semiconductor memory according to the result of the training operation.

6. The memory system according to claim 1 , wherein the interface circuit includes an external input and output driver coupled between the interface circuit and the controller and an internal input and output driver coupled between the interface circuit and the semiconductor memory, and

the on-die termination operation includes controlling the impedance on input and output lines of the external and internal input and output drivers.

7. The memory system according to claim 1 , wherein the ZQ calibration operation includes generating pull-up and pull-down codes according to change of at least one of process, voltage and temperature of the semiconductor memory.

8. The memory system according to claim 1 , wherein the interface circuit includes an external input and output driver coupled between the interface circuit and the controller and an internal input and output driver coupled between the interface circuit and the semiconductor memory, and

the driving force control operation includes controlling driving forces of the external and internal input and output drivers.

9. The memory system according to claim 1 , wherein the read operation includes:

transmitting a read enable signal, which is received from the controller, to the semiconductor memory;

receiving a data strobe signal in response to the read enable signal from the semiconductor memory;

reading system data stored therein; and

transmitting, to the controller, the system data in synchronization with the data strobe signal.

10. The memory system according to claim 1 , wherein the controller is further configured to:

transmit the command to the semiconductor memory when it is determined that the command is for the semiconductor memory.

11. The memory system according to claim 1 , wherein the memory device includes:

a centrally located region in a ball mapping region in which data input/output pins for an operation of the interface circuit and the semiconductor memory are disposed; and

a test pin region in which test pins for a test operation of the interface circuit are disposed.

12. A memory system, comprising:

an external channel operatively coupling a plurality of internal channels through a plurality of interface devices, the plurality of internal channels including first and second internal channels, the plurality of interface devices including first and second interface devices;

the first internal channel operably coupling the first interface device with a first memory device;

the second internal channel operably coupling the second interface device with a second memory device; and

a controller configured to send a plurality of control signals, including a first control signal to send to the first interface device and a second control signal to send to the second interface device, to control an operation of the memory devices or the interface devices, and

wherein the first interface device is configured to receive the first control signal including a command for correcting a duty cycle of a memory control signal transferred by the first interface device.

13. The memory system according to claim 12 , wherein the plurality of internal channels and the plurality of interface devices are included in one memory package.

14. The memory system according to claim 12 , wherein the plurality of control signals includes a memory control signal for one of the first and second memory devices and an interface control signal for one of the first and second interface devices.

15. The memory system according to claim 12 , wherein the controller is configured to send DQ signals for the first interface device and the second interface device through the external channel.

16. The memory system according to claim 15 , wherein the first interface device is configured to send adjusted DQ signals after receiving the DQ signals from the controller.

17. The memory system according to claim 12 , wherein the first interface device is configured to transfer one of the plurality of control signals from the controller to one or both of the first and second memory devices.

18. The memory system according to claim 12 , wherein the first interface device is configured to transfer data between one of the first and second memory devices and the controller.

19. The memory system according to claim 12 , wherein the first interface device is configured to control an operation of a signal transfer device in response to an interface control signal.

20. The memory system according to claim 19 , wherein the interface control signal includes a blocking command, a correction command, and an unblocking command.

21. The memory system according to claim 20 , wherein the blocking command is for stopping an operation of the signal transfer device.

22. The memory system according to claim 20 , wherein the correction command is for correcting a duty cycle of the control signal.

23. The memory system according to claim 22 , wherein the unblocking command is for resuming the operation of the signal transfer device in response to the corrected control signal.