Asynchronous Transmission Device Reducing Synchronization Overhead
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional asynchronous transmission devices experience significant synchronization processing overhead due to the need for multiple stages of synchronization Flip-Flops (FFs) when dealing with different clock frequencies, leading to increased latency and resource utilization.
Innovation Solution
The proposed solution involves a trigger signal transmission unit, a notification signal transmission unit, a trigger signal synchronization unit, and a notification signal retention unit, where the trigger signal is synchronized based on the symbol period of the notification signal, and the sampling timing signal is used to stagger and synchronize the notification signal, reducing the number of necessary synchronization FFs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of stages of synchronization FFs is increased, then the probability of synchronization failure is decreased, but the synchronization processing overhead is increased
Solution Approach 1:
The invention segments the synchronization process into two distinct parts: a trigger signal synchronization unit that handles timing information, and a notification signal retention unit that handles data retention. This segmentation allows the trigger signal to establish the sampling timing without requiring multiple stages of FFs for the actual notification signal synchronization, thereby reducing processing overhead while maintaining synchronization reliability.
Solution Approach 2:
The trigger signal acts as an intermediary between the transmission side and reception side circuits. By synchronizing the trigger signal separately and using it to control the sampling timing of the notification signal, the system avoids the need for multiple stages of synchronization FFs for each notification signal, thus reducing the synchronization processing overhead.
2Reliability
If the number of stages of synchronization FFs is increased, then the probability of synchronization failure is decreased, but the device complexity is increased
Solution Approach 1:
The trigger signal synchronization unit serves multiple functions: it synchronizes the trigger signal, generates the sampling timing signal, and controls the notification signal retention unit. This multi-functionality eliminates the need for separate synchronization circuits for each notification signal, thereby reducing the overall number of synchronization FFs required in the device.
Solution Approach 2:
The invention merges the trigger signal synchronization and notification signal retention functions into a unified structure. The trigger signal synchronization unit combines the synchronization logic with the timing generation logic, and this combined unit controls the notification signal retention unit, thereby reducing device complexity compared to having separate synchronization circuits for each notification signal.
3Productivity
If multiple notification signals are transmitted from transmission side circuit to reception side circuit, then the information transmission capability is improved, but the synchronization circuit complexity is increased
Solution Approach 1:
The trigger signal synchronization unit serves as a universal synchronization mechanism that works for all notification signals. Instead of having separate synchronization circuits for each notification signal, the single trigger signal synchronization unit generates a common sampling timing signal that controls all notification signal retention units, thereby maintaining high information transmission capability while reducing synchronization circuit complexity.
Data Source
AI summary
The present invention provides an asynchronous transmission device and asynchronous transmission method which reduce the synchronization processing overhead. The asynchronous transmission device that receives at least one notification signal in accordance with a reception clock, the notification signal being transmitted in accordance with a transmission clock, includes a trigger signal transmission unit that outputs a trigger signal which is based on the symbol period of the notification signal, a notification signal transmission unit that outputs a notification signal which has its timing staggered by a predetermined time period with respect to the timing of the trigger signal output from the trigger signal transmission unit, a trigger signal synchronization unit that synchronizes the trigger signal, and outputs a sampling timing signal which indicates the sampling timing of the notification signal, and a notification signal retention unit that retains the notification signal in accordance with the sampling timing.