IC Chip Strobe Clock Switching for Initial Data-Eye Stability
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Solution Overview
Problem
As data transmission frequency increases, the initial data-eye for recognizing data becomes smaller due to noise, leading to potential recognition errors, especially when transmitting data packets, where the initial data-eye is smaller than subsequent data-eyes, causing errors in data recognition.
Innovation Solution
An integrated circuit chip design that includes a data output circuit, an oscillator, and a strobe signal supply unit to adjust the clock signal frequency during the initial period of data packet transmission, switching from a lower frequency to a higher frequency or gradually increasing frequency to maintain accurate data recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission frequency is increased to achieve higher data transmission rates, then productivity is improved, but the data-eye for recognizing data is reduced leading to recognition errors
Solution Approach 1:
The strobe signal frequency is made dynamic rather than fixed. The system automatically adjusts the strobe signal frequency based on the transmission stage: using a lower frequency during the initial period when data packets are first transmitted, and switching to a higher frequency for subsequent data transmissions. This dynamic adjustment allows the system to maintain reliable data recognition during the critical initial stage while achieving high transmission rates during normal operation, thus resolving the contradiction between productivity and reliability.
2Productivity
If a fixed high frequency strobe signal is used for data transmission, then productivity is improved, but data recognition errors occur during the initial transmission stage
Solution Approach 1:
The system performs preliminary action by using a lower strobe signal frequency during the initial transmission period before switching to the higher frequency. This preliminary low-frequency operation prepares the transmission channel and ensures that the first data packets are transmitted with sufficient data-eye margin, preventing recognition errors. After this preliminary stage, the system transitions to high-frequency operation for optimal productivity, thus resolving the contradiction between measurement precision and productivity.
3Measurement precision
If the strobe signal frequency is reduced during initial transmission to maintain data-eye, then measurement precision is improved, but productivity is reduced during the initial period
Solution Approach 1:
The system implements periodic action by dividing data transmission into distinct periods: an initial period with lower strobe signal frequency for high precision data recognition, and a subsequent period with higher frequency for high productivity. This periodic switching between different operational modes allows the system to prioritize measurement precision when necessary (initial stage) and productivity when stable (subsequent stages), thus resolving the contradiction between these two parameters.
Data Source
AI summary
An integrated circuit chip includes: an internal circuit; a data output circuit configured to output a data packet of the internal circuit in response to a strobe signal; an oscillator configured to generate a first clock signal; a divider configured to divide the first clock signal and generate a second clock signal; and a strobe signal supply unit configured to supply the second clock signal as the strobe signal during an initial period of transmission of the data packet and supply the first clock signal as the strobe signal after the initial period.