Patent ID: 7062625

Claim:
A method for capturing read data received from a memory that sends data on both a positive and a negative edge of a read data strobe, comprising; receiving read data from the memory; receiving a read data strobe; capturing the read data in a first edge triggered capture device having an enable input when the read data strobe transitions from low to high and the enable input is enabled; capturing the read data in a second edge triggered capture device having an enable input when the read data strobe transitions from high to low and the enable input is enabled; capturing the read data in a third edge triggered capture device having an enable input when the read data strobe transitions from low to high and the enable input is enabled; and capturing the read data in a fourth edge triggered capture device having an enable input when the read data strobe transitions from high to low and the enable input is enabled; wherein the first and second edge triggered capture devices are enabled during a first clock cycle of the read data strobe and the third and fourth edge triggered devices are enabled during a second clock cycle of the read data strobe.