DATA SAMPLING CLOCK EDGE PLACEMENT TRAINING FOR HIGH SPEED GPU-MEMORY INTERFACE

摘要

Circuits, methods, and apparatus for training a phase shift circuit to provide a phase shift for improved date recovery. A specific embodiment of the present invention provides a variable delay cell. A delay through the variable delay cell is changed while training patterns are received. The presence of errors in the received data pattern is tracked, and from the presence or absence of errors a preferred delay is selected and used for receiving data.