| 摘要 |
Apparatus and method of training a data transfer channel between a memory controller and a memory device connected to each other via a data signal transfer channel and an address signal transfer channel. The method comprises reading test data from a latching circuit connected to both an address signal input and a data or control signal output of the memory device or from a read only memory in the memory device, transferring a read signal representing the test data via the data signal transfer channel, detecting data from the read signal with a delay relative to a read clock signal; repeating the transferring, detecting steps, each time detecting the data at a different value of the delay; selecting a value of the delay, preferably a value at which the detected data equal the test data; and setting the delay to the selected value.
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