Dynamic CPU Voltage Monitoring with VID Change Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The dynamic nature of CPU voltage regulation poses challenges in monitoring and ensuring that the voltage supplied to a processor is within the expected margin, as the analog to digital conversion process is slow compared to the rapid changes in the dynamic VID signal, leading to potential inaccuracies in voltage readings.
Innovation Solution
A system and method that detects changes in the VID signal during analog to digital conversion, discarding results if a change occurs and accepting them only if no change is detected, allowing for accurate comparison of the supplied voltage to the expected voltage and computation of errors, which can trigger alerts and remedial actions if thresholds are exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If analog to digital conversion is used to measure voltage, then digital value can be obtained for comparison, but the conversion time is too long (milliseconds) compared to VID change time (microseconds), causing VID to change during conversion and making the measurement inaccurate
Solution Approach 1:
The patent stores the VID value at the beginning of the analog-to-digital conversion process and uses this pre-captured VID value for comparison with the measured voltage. This preliminary action ensures that the VID value used for comparison corresponds to the actual voltage state being measured, eliminating the timing mismatch between VID changes and voltage measurement.
2Measurement precision
If fast voltage monitoring is implemented to keep up with dynamic VID changes, then measurement accuracy improves, but system complexity increases requiring customized or expensive hardware components
Solution Approach 1:
The patent uses existing components within the microcontroller (analog-to-digital converter, VID register, and comparison logic) to achieve accurate voltage monitoring. The system serves itself by utilizing already-present hardware resources rather than requiring additional specialized measurement equipment, thereby maintaining low complexity while achieving high measurement accuracy.
3Reliability
If voltage monitoring is performed continuously to ensure proper regulation, then reliability improves, but it disrupts normal CPU and VRM operation
Solution Approach 1:
The patent performs voltage monitoring at periodic intervals by initiating analog-to-digital conversions at specific moments and checking VID values at corresponding times. This periodic measurement approach provides sufficient verification of voltage regulation reliability without requiring continuous monitoring that would disrupt normal CPU and VRM operation.
Data Source
AI summary
A design structure embodied in a machine readable storage medium for designing, manufacturing, and/or testing a system is disclosed for monitoring a voltage supplied by a voltage regulation module to a processor in response to a dynamic VID generated by the processor. The voltage monitoring system monitors the voltage generated by the voltage regulation module to ensure the supplied voltage is within regulation thresholds. The voltage monitoring system acquires an analog reading of the supplied voltage and converts it to a digital value. If the VID changes during the conversion, the result of the A/D conversion is discarded. If the VID does not change, the voltage monitoring system accepts the result of the A/D conversion and compares the supplied voltage to the voltage expected in response to the VID. The voltage monitoring system may also compute the error between the actual and expected voltage for each accepted A/D conversion.