Replaceable Print Component I2C Address Switching for Sensor Control
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Solution Overview
Problem
Existing print apparatus systems face challenges in efficiently communicating and managing data between replaceable print components and the host print apparatus, particularly in terms of addressing and enabling different logic circuits for various functions, which affects the reliability and accuracy of operations such as print material level sensing and sensor readings.
Innovation Solution
The implementation of a logic circuitry package with multiple addresses, where a first address is used for standard communication and a second address is temporarily enabled for specific tasks, allowing for selective activation of sensor functions and data processing, facilitating communication via I2C protocol and ensuring compatibility with different print components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single address is used for logic circuitry communication, then the communication protocol is simple, but the ability to selectively activate different sensor functions and data processing is limited
Solution Approach 1:
The logic circuitry package implements dynamic address assignment where the I2C address can change based on operational mode. The system transitions between a first address for standard communication and a second address for specific tasks, allowing flexible activation of sensor functions without permanent hardware changes.
Solution Approach 2:
The logic circuitry package is designed to perform multiple functions through a single unified structure. It can operate in different modes (standard communication vs. specific tasks) by switching addresses, enabling one component to serve multiple purposes including sensor activation, data processing, and communication.
2Reliability
If multiple logic circuits are enabled simultaneously, then all sensor functions are available, but power consumption and communication overhead increase
Solution Approach 1:
The system uses periodic activation of the second address and associated sensor functions only when needed for specific tasks. Instead of continuous operation, the logic circuitry switches to the second address temporarily for data processing requirements, then returns to the first address for standard communication, reducing overall power consumption.
Solution Approach 2:
The logic circuitry package autonomously manages its own address switching and sensor activation based on communication requirements. The system self-regulates which functions are active by monitoring communication patterns and automatically enabling/disabling the second address and associated sensors without external control.
3Productivity
If a second address is temporarily enabled for specific tasks, then selective data processing is improved, but communication protocol complexity increases
Solution Approach 1:
The system prepares for specific tasks by temporarily enabling the second address in advance of data processing requirements. The host logic circuit can switch to the second address before initiating intensive data processing operations, ensuring the logic circuitry package is ready to receive and process data efficiently.
Solution Approach 2:
The I2C address switching mechanism acts as an intermediary between the host logic circuit and the logic circuitry package's internal functions. By using address as a mediator, the system can selectively activate different functional modes without requiring complex direct control signals, simplifying the overall communication protocol.
Data Source
AI summary
A replaceable print apparatus component includes a print material reservoir, a print material within the reservoir and a sensing system including an integrated circuit configured to connect to and communicate over a digital bus. The sensing system includes at least one sensor, a digital controller, an analog to digital converter electrically coupled to the digital controller, and a memory array electrically coupled to the digital controller. The digital controller is configured to generate a clock signal for timing operations of the integrated circuit. The operations include initiating the at least one sensor based on values stored in the memory array and generating outputs of the at least one sensor via the analog to digital converter.