Termination Control Circuit for Dynamic Write-Termination Timing
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Solution Overview
Problem
In electronic devices, high-speed data transmission can lead to impedance mismatch phenomena, which existing termination circuits struggle to effectively address, particularly in semiconductor devices lacking efficient control over termination resistor activation periods during write operations.
Innovation Solution
The implementation of a termination control circuit that generates a termination enablement signal to activate a termination resistor during write operations, with adjustable activation periods based on the presence of a write command, and includes signal generation circuits for termination-on and termination-off signals to optimize the termination operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the termination resistor is activated continuously during write operations, then impedance matching is maintained, but power consumption increases
Solution Approach 1:
The termination resistor is activated periodically only during the specific period when data is actually transmitted on the data line, rather than continuously. The termination control circuit generates a termination enablement signal that activates the termination resistor during the write operation period when impedance matching is needed, and deactivates it when data transmission is not occurring, thus maintaining impedance matching reliability while reducing power consumption.
2Reliability
If the termination resistor activation period is extended, then impedance matching is improved, but power consumption increases
Solution Approach 1:
The termination control circuit dynamically adjusts the activation period of the termination resistor based on the actual write operation timing. The circuit detects when write operations are performed and activates the termination resistor only during those specific time windows, making the termination period dynamic rather than fixed or continuous, thereby optimizing the balance between impedance matching effectiveness and power consumption.
3Use of energy by moving object
If the termination control circuit adjusts activation period based on write commands, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The termination control circuit is integrated into the existing memory device architecture and utilizes the same command detection and control signal generation mechanisms already present for write operations. By leveraging the existing control infrastructure, the circuit achieves multi-functionality - using the same control pathways for both write operation management and termination resistor control - thereby reducing the added complexity while still achieving dynamic power optimization.
Data Source
AI summary
An electronic device includes a termination control circuit and a data input/output (I/O) circuit. The termination control circuit is configured to generate a termination enablement signal which is activated during a termination operation period for activating a termination resistor while a write operation is performed. In addition, the termination control circuit is configured to adjust a period that the termination enablement signal is activated according to whether a write command is inputted to the termination control circuit during a set detection period of the write operation. The data I/O circuit is configured to receive data by activating the termination resistor during a period that the termination enablement signal is activated when the write operation is performed.