Patent ID: 11921664
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A buffer chip comprising:
IO (input/output) pads connected to a channel of a controller;
first internal IO pads connected to a first internal channel of first non-volatile memory devices;
second internal IO pads connected to a second internal channel of second non-volatile memory devices;
a path selector configured to connect the IO pads to one of the first internal IO pads and the second internal IO pads in response to a selection signal;
a command decoder configured to receive at least one chip enable signal from the controller and to generate the selection signal corresponding to the at least one chip enable signal; and
a test circuit configured to check whether retraining of a unselected internal channel is required while a selected internal channel is used for an execution of a normal operation and to transmit a retraining request to the controller.