Controller

摘要

According to one embodiment, CONTROLLER includes a phase comparator that receives a data strobe signal outputted from a memory in response to a read enable signal, and a delayed data strobe signal formed by applying a delay to the data strobe signal, and outputs a result of comparison between phases of two signals. The controller also includes a Duty control unit that corrects a Duty of the read enable signal outputted to the memory based upon the comparison result of the phase comparator.

主权项

1. A controller comprising:
a phase comparator that receives a data strobe signal outputted from a memory in response to a read enable signal, and a delayed data strobe signal formed by applying a delay to the data strobe signal, compares a phase of the data strobe signal and a phase of the delayed data strobe signal, and outputs a comparison result; and a Duty control unit that corrects a Duty of the read enable signal outputted to the memory based upon the comparison result from the phase comparator.