Memory system for controlling input command priority and operation method therefor

1. An operating method for a memory system including one or more memory device, the operating method comprising:

checking a priority information on a plurality of input commands;

storing the input commands having a high priority information as a first command in a first command storage unit, storing the input commands having a low priority information as a second command in a second command storage unit; and

transmitting the input commands stored in the first or second command storage units for operating the memory devices,

wherein the transmitting of the input commands comprises transmitting a command stored in the first command storage unit to the memory devices, prior to a command stored in the second command storage unit,

wherein the storing of the input commands further comprises:

managing the first command stored in the first command storage unit in the form of a linked-list, and

managing the second command stored in the second command storage unit in the form of a tree-list,

wherein the low priority information comprises:

a sequential information requesting that the input commands are sequentially executed according to the input order of the input commands; and

a flexible information requesting the flexible change of the execution sequence such that the input commands are executed prior to a command having the sequential information, and

wherein the managing of the second command comprises storing a second command having the sequential information in the second command storage unit at a level of the tree-list, which is lower than that of a second command having the flexible information.

2. The operating method of claim 1 , wherein the high priority information requests a compulsory change of an execution sequence, regardless of an input order of the input commands.

3. The operating method of claim 1 , wherein the low priority information requests that the input commands are sequentially executed according to the input order of the input commands, while requesting a flexible change of the execution sequence.

4. The operating method of claim 1 , wherein the managing of the second command further comprises:

managing the level of the tree-list of the second command having the sequential information based on logical address values corresponding thereto, and

managing the level of the tree-list of the second command having the flexible information based on logical address values corresponding thereto.

5. The operating method of claim 4 , wherein the managing of the second command further comprises transferring the second command having the sequential information, which is not executed within a preset time after being stored in the second command storage unit, to a level of the tree-list, which is higher than that of the second command having the flexible information.

6. The operating method of claim 1 , wherein the high priority information comprises:

an order information requesting that the input commands must be executed prior to a command having the low priority information; and

a head information requesting that the input commands must be first executed.

7. A memory system comprising:

a controller suitable for checking a priority information on a plurality of input commands, storing the input commands having a high priority information as a first command in a first command storage unit, and storing the input commands having a low priority information as a second command in a second command storage unit; and

one or more memory device suitable for operating in response to the input commands stored in the first or second command storage units,

wherein the controller transmits a command stored in the first command storage unit to the memory devices, prior to a command stored in the second command storage unit,

wherein the controller manages the first command stored in the first command storage unit in the form of a linked-list, and manages the second command stored in the second command storage unit in the form of a tree-list,

wherein the low priority information comprises:

a sequential information requesting that the input commands are sequentially executed according to the input order of the input commands;

a flexible information requesting the flexible change of the execution sequence such that the input commands are executed prior to a command having the sequential information, and

wherein the controller stores a second command having the sequential information in the second command storage unit at a level of the tree-list, which is lower than that of a second command having the flexible information.

8. The memory system of claim 7 , wherein the high priority information requests a compulsory change of an execution sequence, regardless of an input order of the input commands.

9. The memory system of claim 8 , wherein the high priority information comprises:

an order information requesting that the input commands must be executed prior to a command having the low priority information; and

a head information requesting that the input commands must be first executed.

10. The memory system of claim 7 , wherein the low priority information requests that the input commands are sequentially executed according to the input order of the input commands, while requesting a flexible change of the execution sequence.

11. The memory system of claim 7 , wherein the controller manages the level of the tree-list of the second command having the sequential information based on logical address values corresponding thereto, and manages the level of the tree-list of the second command having the flexible information based on logical address values corresponding thereto.

12. The memory system of claim 11 , wherein the controller transfers the second command having the sequential information, which is not executed within a preset time after being stored in the second command storage unit, to a level of the tree-list, which is higher than that of the second command having the flexible information.