Cross-channel data communication with data phase-locked loop

摘要

A data communication system includes a unit that receives edge-encoded data from a data link. The unit includes a counter, a data bit reader, and a phase-locked loop. The counter counts at a sampling frequency between a minimum value and an end-count value. The data bit reader is connected to receive the edge-encoded data. The data bit reader samples the edge-encoded data at the sampling frequency to detect data bits of the edge-encoded data. The phase-locked loop updates the end-count value if consecutive bits of the data bits are detected prior to an expected iteration of the counter. The phase-locked loop also updates the end-count value if consecutive bits of the data bits are detected later than the expected iteration of the first counter.

主权项

1. A data communication system comprising:
a first unit that receives edge-encoded data from a data link, wherein the first unit comprises:
a first counter that counts at a sampling frequency from a minimum value to an end-count value;a first data bit reader connected to receive the edge-encoded data, wherein the first data bit reader samples the edge-encoded data at the sampling frequency to detect data bits of the edge-encoded data; anda first phase-locked loop that updates the end-count value if consecutive bits of the data bits are detected prior to an expected iteration of the first counter, and that updates the end-count value if consecutive bits of the data bits are detected later than the expected iteration of the first counter, wherein the first phase-locked loop subtracts one iteration from the end-count value upon detection of consecutive data bits one iteration prior to the expected iteration.