PWM Signal Controller Pin Multiplexing for Mode Configuration
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Solution Overview
Problem
Existing PWM signal controlling apparatuses require additional pins for mode setting, leading to increased circuit size and cost due to the need for additional pins and potential changes in packaging and circuit board design.
Innovation Solution
A PWM signal controlling apparatus that utilizes a signal pin, a core circuit, a setting judging circuit, a signal adjusting and selecting circuit, and a timer circuit to accomplish mode setting without requiring additional pins, by adjusting and selecting external input signals based on timing processes and reference values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional pins are added to the PWM signal controlling apparatus for mode setting, then the mode setting function is improved, but the circuit layout surface area and cost increase
Solution Approach 1:
The existing signal pin is made multi-functional by enabling it to perform both its original signal transmission function and the additional mode setting function. The control apparatus detects whether the signal pin is connected to a setting device and automatically configures its operation mode accordingly, eliminating the need for dedicated mode setting pins while maintaining full mode setting capability.
2Adaptability or versatility
If additional pins are added to the PWM signal controlling apparatus for mode setting, then the mode setting function is improved, but the packaging type and circuit board design must be changed
Solution Approach 1:
The signal pin is designed to universally serve multiple purposes: normal signal input/output and mode setting configuration. The internal detection circuit automatically identifies when the pin is connected to a setting device and switches the apparatus to configuration mode, eliminating the need for separate mode setting pins and associated packaging/circuit board changes.
3Adaptability or versatility
If additional pins are added to the PWM signal controlling apparatus for mode setting, then the mode setting function is improved, but engineering issues and costs increase
Solution Approach 1:
The signal pin is designed to universally serve multiple purposes: normal signal input/output and mode setting configuration. The internal detection circuit automatically identifies when the pin is connected to a setting device and switches the apparatus to configuration mode, eliminating the need for separate mode setting pins and associated packaging/circuit board changes.
Solution Approach 2:
The control apparatus automatically detects whether the signal pin is connected to a setting device and self-configures its operation mode without requiring external control signals or additional components. This self-service capability simplifies the manufacturing process and reduces engineering complexity by eliminating manual configuration requirements.
Data Source
AI summary
A pulse width modulation signal controlling apparatus including a signal pin, a core circuit, a setting judging circuit, a signal adjusting and selecting circuit, and a timer circuit is disclosed. The signal pin is connected to a setting device for receiving an external input signal. The setting judging circuit receives and compares a setting signal with a reference value to generate a setting judgment result. The signal adjusting and selecting circuit couples the signal pin to the setting judging circuit and adjusts the external input signal into the setting signal according to the setting device in a first state, and couples the signal pin to the core circuit in a second state. The timer circuit controls the state of the signal adjusting and selecting circuit, wherein the timer circuit sets the signal adjusting and selecting circuit in the first state during a predetermined time period.