Self-correcting I/O interface driver scheme for memory interface

摘要

A self-correcting I/O interface driver scheme uses a delay difference detector to detect a difference in delays between an I/O data path and an I/O clock path. The delay difference detector inputs signals from a data output pin connected to the I/O data path and a clock output pin connected to the I/O clock path. Upon determining a delay difference between the signals from the data and clock output pins, the delay difference detector generates signals to one or more drivers in the I/O data path and the I/O clock path. These signals from the delay difference detector are used to effectively adjust delays of the one or more drivers in order to effectively reduce the delay difference between the I/O data path and the I/O clock path.