Patent ID: 8638622

Claim:
A differential data strobe receiver configured to receive a differential data strobe signal at a first strobe input and a second strobe input, wherein transitions of said differential data strobe signal indicate sample points for an associated data signal, the differential data receiver configured to identify said transitions of said differential strobe signal by differentially comparing values of said differential strobe signal received at said first strobe input and said second strobe input, the differential data strobe receiver comprising: strobe gating circuitry configured to generate a strobe gating signal, wherein said associated data signal can only be sampled in dependence on said differential data strobe signal when said strobe gating signal is asserted; and strobe input termination circuitry configured selectively to provide a first termination connection for said first strobe input and a second termination connection for said second strobe input, wherein said differential data strobe receiver is configured, prior to receiving said differential data strobe signal in association with said associated data signal, to participate in an initial gate training process to determine a gating delay used to phase align said strobe gating signal with respect to said differential data strobe signal, wherein said strobe input termination circuitry is configured to provide an asymmetric configuration of said first termination connection and said second termination connection during said initial gate training process.