| 摘要 |
PROBLEM TO BE SOLVED: To adjust reference voltage of a DQ input buffer.SOLUTION: A memory controller includes a first input buffer for determining a received data signal on the basis of reference voltage, a second input buffer for inputting a received data strobe signal, a data latch circuit for acquiring a data signal outputted by the first input buffer on the basis of phases of a rising edge and a falling edge of an internal data strobe signal outputted by the second input buffer, a duty ratio detection circuit for detecting a duty ratio of the internal data strobe signal, and a reference voltage generation circuit for adjusting reference voltage on the basis of the duty ratio detected by the duty ratio detection circuit. |
