Sequencing Microcontroller AC Failure Detection
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Solution Overview
Problem
Conventional computer systems fail to detect AC failures in all operating states, leading to potential deadlocks and requiring manual restarts, especially in remote installations, resulting in high maintenance costs.
Innovation Solution
A computer system with a sequencing microcontroller that monitors control signals to detect shutdowns and reboot commands, ensuring successful reboots by signaling reboot commands to the chipset at predetermined intervals until a successful reboot is detected, independent of the power supply unit's internal control operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional AC failure detection mechanisms are used, then the system can detect power outages in normal operating states, but the system cannot detect AC failures during initialization or in all operating states, leading to deadlocks
Solution Approach 1:
The sequencing microcontroller is designed to perform multiple functions: it sequences power supply to components, monitors control signals for AC failure detection, and manages reboot operations. This multi-functional design allows AC failure detection to work across all operating states including initialization, not just normal operation
Solution Approach 2:
The system implements feedback by having the sequencing microcontroller monitor control signals from the power supply unit and chipset. When an AC failure is detected through signal monitoring, the microcontroller receives feedback about the power state and automatically initiates reboot commands to restore system operation
2Stability of the object's composition
If the system waits for power good signals during startup, then normal power-up sequencing is maintained, but the system hangs indefinitely when AC power is interrupted during startup
Solution Approach 1:
The sequencing microcontroller performs preliminary monitoring of control signals before the system enters a hung state. By continuously watching power good signals and other control signals during startup, the microcontroller can detect AC failures early and take preliminary action to initiate reboot sequences, preventing the indefinite waiting that causes system hangs
Solution Approach 2:
The sequencing microcontroller acts as an intermediary between the power supply unit and the chipset. It monitors the interface signals and mediates the interaction by detecting AC failures and initiating reboot commands, preventing the direct hang between power supply expectations and chipset waiting
3Reliability
If manual restart operations are required, then system reliability can be maintained through user intervention, but maintenance costs increase significantly for remote installations
Solution Approach 1:
The system implements self-service by automatically detecting AC failures and initiating reboot operations without human intervention. The sequencing microcontroller monitors power signals, detects failures, and automatically commands reboots to the chipset, allowing the system to restore itself even in remote installations where physical access is difficult
Data Source
AI summary
A computer system including a power supply unit that generates at least one DC supply voltage (Vcc, Vaux) based on an AC supply voltage (VAC), and a system board electrically connected to the power supply unit, the system board comprising a sequencing microcontroller that selectively activates further components of the system board, the further components comprising a chipset, wherein the sequencing microcontroller monitors the state of at least one control signal of the power supply unit and/or the system board to detect a shutdown and a successful reboot of the system board and, after a shutdown of the system board is detected, signals a reboot command to at least the chipset at predetermined intervals until a successful reboot of the system board is detected.