Circuitry for reading from a double data rate type memory, the circuitry including control logic, a first bi-directional input/output interface (I/O) configured to be coupled to a data bus of a double data rate type memory and to receive therefrom a data transmission having a duration selected by the control logic, a second bi-directional input/output interface (I/O) configured to be coupled to a data strobe line of the double data rate type memory, a gate coupled to the second bi-directional input/output interface configured for controlling the duration of a data strobe signal received along the data strobe line in response to a data strobe masking gating signal and a data strobe masking gating signal modifier applying to the expected data receipt duration indicating signal a variable time delay such as to center the expected data receipt duration indicating signal about the midpoint of the duration of the data transmission.