Serial Communication Deskew Buffer Circuit
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Solution Overview
Problem
Existing serial communication techniques face increased power consumption due to larger circuit sizes in high-frequency operating circuits when dealing with multiple channels, particularly when jitter noise causes errors that require frequency-deviation accommodation, deskew adjustment, and deframing.
Innovation Solution
A serial communication device with a serializer and deserializer that uses a protocol with control symbols for start and end frames, including receiving buffer circuits to detect and extract valid data, allowing for deskew and frequency deviation accommodation while reducing power consumption by optimizing circuit size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency-deviation accommodation, deskew adjustment, and deframing are performed to prevent errors caused by jitter noise in multi-channel communication, then communication reliability is improved, but power consumption increases due to increased circuit size of high-frequency operating circuits
Solution Approach 1:
The patent applies preliminary action by performing deframing, lane-to-lane deskew adjustment, and frequency-deviation accommodation in advance during the data reception process. The receiving buffer circuits store valid data and perform these adjustments before final data extraction, ensuring that communication reliability is maintained while allowing for optimized circuit design that reduces power consumption compared to continuous high-frequency operation.
2Reliability
If a protocol with start and end frames is used for error detection in simplex serial communication, then communication reliability is improved, but device complexity increases due to additional control symbols and processing requirements
Solution Approach 1:
The patent applies universality by designing receiving buffer circuits that perform multiple functions: they store valid data, detect data-transmission start and end frames, perform lane-to-lane deskew adjustment, and conduct frequency-deviation accommodation. This multi-functionality allows the same circuit components to handle both data buffering and protocol processing, thereby improving error detection capability without proportionally increasing device complexity.
Data Source
AI summary
A serial communication device includes a serializer configured to transmit serial data for each channel via a transmission line for the corresponding channel, and a deserializer configured to receive the serial data. The serializer includes a transmission processing circuit that creates a protocol where pieces of valid data are inserted between a start frame and an end frame for each channel. The deserializer includes buffers for the respective channels to detect the start frame of each channel, store the valid data in the corresponding buffer, set, as a to-be-processed buffer, at least one buffer that stores the valid data on a channel to be deskewed, start externally transferring data from the to-be-processed buffer when a fixed amount of the valid data is stored or when the end frame is detected, detect a boundary between the valid data and the end frame, and extract the valid data from the to-be-processed buffer.