Control Circuit Timing for Crash-Free Firmware Updates
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Solution Overview
Problem
Projection devices using application-specific chips (ASICs) from MediaTek and Texas Instruments are prone to errors that cause system crashes during firmware updates.
Innovation Solution
A control circuit with a power converter, switch unit, and first and second circuits is employed, where the first circuit controls the switch unit to convert a first voltage into a third voltage for activating the second circuit, ensuring timely receipt of the first signal and preventing errors during firmware updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the second circuit is activated before receiving the first signal during firmware update, then the circuit activation is faster, but errors occur causing system crashes
Solution Approach 1:
The first circuit performs preliminary actions by first providing the first signal to the preset pin of the second circuit before activating it. This preliminary signaling ensures the second circuit is ready to receive commands in the correct state, preventing timing-related errors during firmware updates while maintaining fast activation.
Solution Approach 2:
The control circuit implements a feedback mechanism where the first circuit monitors and controls the activation timing of the second circuit based on signal receipt confirmation. This feedback loop ensures the second circuit is activated only after it has properly received the first signal, coordinating the timing between circuits to prevent system crashes.
2Measurement precision
If additional microcontrollers are added to control the timing, then the timing precision is improved, but the device complexity and cost increase
Solution Approach 1:
The first circuit is designed to perform multiple functions: it generates the first signal, controls the timing of the second circuit activation, and coordinates the firmware update process. By making the first circuit multi-functional, the patent achieves precise timing control without adding separate microcontrollers, thereby reducing device complexity and cost.
Solution Approach 2:
The control circuit uses its existing components to self-coordinate the activation timing. The first circuit autonomously manages the signaling and activation sequence without requiring external control units, allowing the system to achieve precise timing control while minimizing additional hardware requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents system crashes by ensuring the second circuit receives the first signal at the appropriate time, allowing smooth firmware updates without additional microcontrollers, reducing costs and enhancing design flexibility.
Implementation Method 1
a power converter, a switch unit, a first circuit, and a second circuit, wherein the first circuit is coupled to the power converter
Implementation Method 2
the switch unit converts the first voltage from the power converter into a third voltage to be provided to the second circuit
Data Source
AI summary
A control circuit and control a method thereof are provided. After a first circuit provides a first signal to a preset pin of a second circuit, the first circuit controls a switch unit to convert a first voltage from a power converter into a third voltage to be provided to the second circuit, so as to activate the second circuit to enter a firmware update mode in response to the first signal.