Asymmetric ODT Parameter Coding for Signal Integrity and Power Control
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Solution Overview
Problem
Existing semiconductor devices face challenges in managing asymmetric on-die-termination (ODT) circuits, which require efficient control to prevent signal distortion and optimize power consumption.
Innovation Solution
An apparatus and method for storing parameter codes to manage asymmetric ODT circuits, where the ODT control circuit checks and adjusts the termination states of signal lines between devices, enabling asymmetric ODT configurations by controlling pull-up and pull-down circuits based on voltage differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If asymmetric ODT circuit is configured to improve signal integrity, then signal quality is improved, but power consumption increases
Solution Approach 1:
The ODT control circuit dynamically adjusts the termination resistance values based on the detected voltage levels. The circuit switches between different ODT states (first ODT state with higher termination resistance, second ODT state with lower termination resistance) depending on whether the voltage difference is above or below a threshold, thereby optimizing both signal integrity and power consumption adaptively
Solution Approach 2:
The invention changes the termination resistance parameter values based on operating conditions. By detecting voltage levels and comparing them to thresholds, the system selects appropriate termination resistance values from a set of predefined values, optimizing the balance between signal quality and power consumption for different operating scenarios
2Use of energy by moving object
If ODT control circuit dynamically adjusts termination states to optimize power consumption, then power efficiency is improved, but device complexity increases
Solution Approach 1:
The ODT control circuit implements local quality control by independently managing termination resistance for different voltage levels (first voltage level and second voltage level). The circuit applies different termination strategies to different parts of the voltage range, using higher termination resistance for one voltage level and lower termination resistance for another, thereby optimizing power consumption locally for each operating condition
Solution Approach 2:
The ODT control circuit performs self-service by automatically detecting voltage levels and selecting appropriate termination resistance values without external intervention. The circuit monitors its own operating conditions and adjusts its termination parameters autonomously based on the detected voltage differences, reducing the need for complex external control mechanisms
Data Source
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AI summary
An apparatus, a memory device, and a method for storing parameter codes with respect to asymmetric on-die-termination (ODT) are provided. The apparatus is connected to an external device via a signal line, and includes: an on-die termination (ODT) circuit set in a first ODT state; a plurality of signal pins, each of which is connected to the signal line; and an ODT control circuit configured to: identify whether a second ODT state of the external device corresponds to the first ODT state, and based on the apparatus being an asymmetric ODT in which the first ODT state and the second ODT state are different, provide an asymmetric ODT parameter code to the external device, and disable the ODT circuit when a signal is not transmitted through the signal line.