Patent ID: 8949520
Filing Date: 2015-02-03
Classification: G06F,G06Q,G11C

Abstract:
1. A method of operating a memory controller in a system that includes the memory controller and a memory device, the memory device including a command interface and a plurality of memory banks, each bank including a plurality of rows of memory cells, the method comprising: transmitting an auto-refresh command from the memory controller to the memory device, wherein responsive to the auto-refresh command, during a first time interval, the memory device performs refresh operations to refresh the memory cells and the command interface of the memory device is placed into a calibration mode for at least a portion of the first time interval; and concurrently, during at least a portion of the first time interval while the memory device is performing refresh operations, performing a calibration of the command interface of the memory device, wherein performing a calibration of the command interface of the memory device includes placing the command interface of the memory device into a loopback mode.