Memory Input Biasing Across Low-Power Control Unit Sectors
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Solution Overview
Problem
Microcontrollers face challenges in configuring memory inputs/output when in low consumption mode, leading to untimely activation/deactivation and increased power consumption due to floating polarization values, which can result in data modification and reduced battery life.
Innovation Solution
A system with two power supply sectors in the control unit allows for continuous memory configuration: the first sector powers only during operating mode and the second sector remains powered in both operating and low consumption modes, ensuring a stable logic state is applied to memory inputs via configuration circuits and resistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the configuration circuit is placed in the first power supply sector and switched off during low consumption mode, then power consumption is reduced, but the memory input/output becomes floating and causes untimely activation or deactivation
Solution Approach 1:
The control unit is divided into two power supply sectors: the first sector contains the configuration circuit and is switched off during low consumption mode to save power, while the second sector contains the polarization value application circuit and remains powered to maintain memory input/output stability. This segmentation allows simultaneous achievement of power savings and reliability maintenance.
2Reliability
If the configuration circuit is kept powered during low consumption mode, then memory input/output stability is maintained, but power consumption increases
Solution Approach 1:
The control unit is divided into two power supply sectors: the first sector contains the configuration circuit and is switched off during low consumption mode to save power, while the second sector contains the polarization value application circuit and remains powered to maintain memory input/output stability. This segmentation allows simultaneous achievement of power savings and reliability maintenance.
3Use of energy by moving object
If the memory input is left floating during low consumption mode, then power consumption is minimized, but leakage currents occur and battery life is reduced
Solution Approach 1:
The control unit is divided into two power supply sectors: the first sector contains the configuration circuit and is switched off during low consumption mode to save power, while the second sector contains the polarization value application circuit and remains powered to maintain memory input/output stability. This segmentation allows simultaneous achievement of power savings and reliability maintenance.
Solution Approach 2:
The patent converts the potential harm of leaving the memory input floating (which would cause leakage currents) into a beneficial state by actively applying a polarization value through the second power supply sector. This ensures the input is held at a defined logic level, preventing leakage currents while maintaining low power consumption through selective powering of only the essential second sector.
Data Source
AI summary
A system includes a control unit configured to be electrically connected to an input of a memory via a communication interface. The control unit includes a first power supply sector configured to be powered when the control unit is in an operating mode and a second power supply sector configured to be powered when the control unit is in the operating mode and in a low consumption mode. In the first power supply sector, the control unit includes a first configuration circuit operating to configure a polarization value of the input of the memory via the communication interface for the operating mode. In the second power supply sector, the control unit includes a second configuration circuit operating to configure a polarization value of the input of the memory via the communication interface for the low consumption mode.