Server Power-Up Reset Glitch Prevention via Voltage Monitoring
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Solution Overview
Problem
Current server systems face issues where glitches generated by logic elements are mistaken as reset signals during power-up, leading to unstable initialization and operation of VLSI circuits.
Innovation Solution
A server system and method that includes a power management module generating work power and a power good signal, a logic control module generating a reset signal, and a voltage monitoring module controlling the reset signal's voltage to prevent glitches by maintaining it below a first voltage until the work power exceeds a threshold, then increasing it above a second voltage for a defined period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reset signal is generated by a logic control module upon receiving the power good signal, then the server can be initialized and reset normally, but a glitch may be generated in the logic devices during power-up and be mistaken as a reset signal, causing the VLSI circuit to be reset prematurely and affecting server operation
Solution Approach 1:
The voltage monitor module performs preliminary detection of the work power voltage before the reset signal is generated. It delays the reset signal generation until the work power voltage exceeds the threshold voltage, ensuring that the VLSI circuit is properly powered before initialization occurs. This preliminary voltage check prevents premature reset signals caused by glitches during the power-up transient period.
Solution Approach 2:
The voltage monitor module acts as an intermediary between the power management module and the logic control module. It monitors the work power voltage and only allows the logic control module to generate the reset signal when the voltage condition is satisfied. This intermediary function filters out glitch signals that occur during power-up before they can affect the VLSI circuit initialization.
2Reliability
If the server system uses conventional power-up sequencing without voltage monitoring, then the system structure remains simple, but glitches during power-up can cause incorrect reset signal generation and unstable initialization
Solution Approach 1:
The power management function is segmented into distinct modules: the power management module generates work power, the voltage monitor module monitors voltage levels, and the logic control module generates reset signals. This segmentation allows each module to perform its specific function reliably, with the voltage monitor module acting as a gatekeeper that prevents glitch-induced premature reset operations.
Solution Approach 2:
The voltage monitor module performs preliminary voltage detection before enabling reset signal generation. By checking whether the work power voltage exceeds the threshold voltage in advance, the system ensures stable initialization conditions are met before the VLSI circuit begins operation, preventing glitch-related initialization failures.
Data Source
AI summary
A server system and controlling method for an operation timing after being powered up are disclosed. The sever system controls a reset signal to have a voltage lower than a first voltage value by introducing a voltage monitoring module when a work power lower than a voltage threshold. On the other hand, when the work power voltage increases to higher than the voltage threshold of the voltage monitoring module, the voltage monitoring module controls the reset signal voltage to be higher than a second voltage value, whereby achieving in a technical efficacy of stable initialization and reset of the server.