Patent ID: 8593893

Claim:
A controller comprising: a set of first terminals to be coupled to a device that is under control of the controller; and a control circuit configured to generate and output onto the set of first terminals edge specifying information that takes a selected one of first and second states, the edge specifying information being supplied to the device to cause the device to activate a data strobe signal at a first timing when the selected one of the edge specifying information is the first state and at a second timing, that is different from the first timing, when the edge specifying information is the second state, the control circuit being further configured to generate and output onto the set of first terminals a read command, the read command being supplied to the device to cause the device to return to the controller a data signal while activating the data strobe signal at one of the first and second timings that is designated by the selected one of the states of the edge specifying information.