Patent ID: 7586955
Filing Date: 2009-09-08
Classification: G11C

Abstract:
1. An interface circuit for receiving and outputting a data signal and a strobe signal that regulates a timing of sampling the data signal in which phase relationships between said data signal and said strobe signal are different from each other between an input and an output, said interface circuit comprising: a first circuit that controls to switch a phase difference between said data signal and said strobe signal outputted on a side that outputs said data signal and said strobe signal, said first circuit varying a phase shift amount of at least one of an output data signal and an output strobe signal based on a phase switching control signal; and a second circuit that controls to switch a phase difference between said data signal and said strobe signal received on a side that receives said data signal and said strobe signal, said second circuit varying a phase shift amount of at least one of a received data signal and a received strobe signal based on said phase switching control signal.