Memory device, system including the same, and operating method of memory device

A decoding module comprising:

• a cache device;
• and
• a decoder configured to:
• determine whether or not decoded data corresponding to an address received from a memory controller is stored in the cache device;
• transmit the decoded data stored in the cache device to the memory controller in response to determining that the decoded data corresponding to the address is stored in the cache device;
• and
• receive the data corresponding to the address from a memory device, decode the data corresponding to the address by using the decoder to generate decoded data, store the decoded data in the cache device, and transmit the decoded data to the memory controller in response to determining that the decoded data corresponding to the address is not stored in the cache device, and
• wherein the decoding module is configured to:
• store, in the cache device, decoding information of data having a long decoding latency and evict decoding information of data having a short decoding latency.

A method for performing cache management in a memory system, the method comprising:

• receiving, by a decoding module, an address from a host device;
• determining, by the decoding module, whether or not decoded data corresponding to the address is stored in a cache device included in the decoding module;
• transmitting, by the decoding module, the decoded data stored in the cache device to a memory controller in response to determining that the decoded data corresponding to the address is stored in the cache device;
• and
• the decoding module decoding the data corresponding to the address received from the memory device by using a decoder to generate decoded data, storing the decoded data in the cache device, and transmitting the decoded data to the memory controller in response to determining the decoded data corresponding to the address is not stored in the cache device,
• wherein the method further comprises:
• storing, in the cache device, decoding information of data having a long decoding latency and evict decoding information of data having a short decoding latency.