Dynamic Entry Shift Register Deskewing Decentralized Data Streams
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Solution Overview
Problem
Conventional methods for deskewing data in communications systems are ineffective for data lanes that are physically isolated or separated by distance, as they require all lanes to be in close proximity to align signals simultaneously, which is not feasible in advanced technologies like 2.5D packaging and HBM chip technology.
Innovation Solution
The implementation of a dynamic entry point shift register system with timers and pipeline stages allows for deskewing of decentralized data streams across any distance by using alignment markers and distributed autonomous logic to calculate and compensate for delays between physically separated data lanes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional deskewing methods are used to align signals simultaneously, then timing relationship is restored for close-proximity lanes, but physical separation between lanes cannot be accommodated
Solution Approach 1:
The patent divides the deskewing function into autonomous segments distributed across multiple lanes. Each lane independently performs marker detection, timer management, and delay calculation without requiring centralized coordination, enabling physical separation while maintaining timing alignment precision.
Solution Approach 2:
The system performs preliminary actions by inserting synchronization markers into data streams before transmission. Each lane detects these markers in advance, starts timers, and calculates compensated delays proactively, allowing the system to adapt to physical separations while restoring timing relationships.
2Adaptability or versatility
If data lanes are physically separated to enable advanced packaging technologies, then design flexibility is improved, but signal timing synchronization becomes difficult
Solution Approach 1:
The patent implements feedback mechanisms where each lane monitors its own marker detection timing and communicates delay information to other lanes. This distributed feedback enables each lane to calculate compensated delays based on actual propagation times, maintaining synchronization despite physical separations required for advanced packaging.
Solution Approach 2:
The system dynamically changes the entry point parameter of shift registers based on calculated compensated delays. By adjusting this parameter according to measured propagation times, the system compensates for timing differences caused by physical separations while preserving packaging design flexibility.
3Manufacturing precision
If centralized coordination is used for deskewing, then timing relationship is restored, but system complexity increases
Solution Approach 1:
Each data lane is equipped with autonomous logic that independently performs marker detection, timer management, and delay calculation. The lanes serve themselves without requiring external coordination, reducing system complexity while maintaining timing alignment precision through self-organized synchronization.
Data Source
AI summary
In one embodiment, a method includes receiving an input signal at a local data lane comprising a dynamic entry shift register, the input signal comprising a marker also received at a remote data lane, identifying receipt of the marker in the local data lane, starting a timer and notifying the remote data lane that the marker was found, receiving a marker found status from the remote data lane and saving a value of the timer, calculating a compensated delay for the remote data lane based on the timer value and a number of pipeline stages for the remote data lane, and setting an entry point to the dynamic entry shift register based on the compensated delay to deskew data between the local data lane and the remote data lane.