Apparatus and method for improving compatibility of computer-memory link-based device

A computer-memory link-based apparatus comprising:

• a controller coupled to each of at least one host and at least one memory device,
• wherein the controller comprises a processor configured to transfer an input/output request received from the at least one host to the at least one memory device and a memory configured to store a firmware binary, and
• wherein the controller is configured to:
• check a first interface version of a first external device among the at least one external device;
• write, into a firmware binary, a setting value for changing a controller register configuration according to the first interface version;
• and
• process a request received from the first external device based on the firmware binary.

A method for operating a system, the method comprising:

• performing a register configuration based on a firmware binary after power is supplied;
• performing a Link Training and Status State Machine (LTSSM) operation in response to an active state request received from an external device;
• checking an interface version of the external device;
• determining whether the interface version of the external device and the register configuration are compatible;
• performing a Data Object Exchange (DOE) with the external device for a setting value based on a compatibility;
• and
• updating the setting value and storing an updated setting value in the firmware binary.