Adaptive timing using clock recovery

A system comprising:

• a host device configured to transmit a host data signal based on a host clock signal;
• and
• a local device comprising:
• circuitry configured to receive, based on a receive clock signal, the host data signal from the host device as an incoming data signal, wherein the receive clock signal is based on a local clock signal;
• an offset adjustment circuit configured to receive timing information relating the local clock signal to the incoming data signal and calculate a phase offset and a frequency offset indicative of one or more adjustments to be made to the local clock signal;
• a first phase interpolator configured to produce the receive clock signal by adjusting the local clock signal in response to the phase offset and the frequency offset;
• a clock recovery circuit configured to generate the timing information responsive to whether the receive clock signal leads or lags the incoming data signal;
• a second phase interpolator configured to produce a transmit clock signal by adjusting the local clock signal in response to the frequency offset;
• and
• circuitry configured to transmit, based on the transmit clock signal, an outgoing data signal to the host device.

A method, comprising:

• receiving an incoming data signal based on a receive clock signal, wherein the receive clock signal is based on a local clock signal;
• determining a phase offset and a frequency offset indicative of one or more adjustments to be made to the local clock signal based on timing information relating the local clock signal to the incoming data signal;
• producing the receive clock signal by adjusting the local clock signal in response to the phase offset and the frequency offset;
• generating the timing information responsive to whether the receive clock signal leads or lags the incoming data signal;
• producing a transmit clock signal by adjusting the local clock signal in response to the frequency offset;
• and
• transmitting an outgoing data signal based on the transmit clock signal.