Self-negotiation method, clock and data recovery unit and circuit board
By introducing host-side and line-side sub-units for auto-negotiation in the clock and data recovery unit, the latency and power consumption problems in the auto-negotiation process of the clock and data recovery unit in the prior art are solved, realizing a low-latency and low-power auto-negotiation process, improving link establishment efficiency and device compatibility.
CN117178528BActive Publication Date: 2026-06-19HUAWEI TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2021-06-29
- Publication Date
- 2026-06-19
Smart Images
Figure CN117178528B_ABST
Abstract
This application provides an auto-negotiation method, a clock and data recovery unit, and a circuit board. The method includes: a line-side subunit performing a first auto-negotiation process with the peer device to determine a capability mode; and a host-side subunit performing a second auto-negotiation process with the switch unit based on the capability mode to achieve auto-negotiation between the switch unit and the peer device. Thus, this application achieves indirect auto-negotiation between the switch unit and the peer device through a two-stage auto-negotiation process, which conforms to protocol specifications and is easy to implement.
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