Intel Corporation
Methods and apparatus for providing deterministic latency for communications interfaces

Abstract:

A transmitter device may communicate with a receiver device via one or more data links. Data transmitted over the data links may be conveyed in accordance with a communications protocol that requires a deterministic latency for all data lanes in each of the data links. The receiver device may include a deterministic latency controller configured to store a worst-case latency value acquired upon initial startup and a predetermined link reinitialization latency compensation value. During normal operation, the deterministic latency controller may sum together the worst-case latency value and the predetermined link reinitialization latency compensation value to obtain a total compensated deterministic latency that is applied to all data links for simultaneous data release.