HSIC Module Power State Control for Current Reduction
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Solution Overview
Problem
High Speed Inter Chip (HSIC) communication systems based on USB technology consume high electric current, leading to rapid battery depletion in mobile terminals due to their power-intensive nature.
Innovation Solution
Implementing a control interface to manage the state of HSIC modules, transitioning them from an active state to a suspend state and then to a power-off state when no communication requests are detected for predefined periods, using control lines like host suspend request and host active lines to minimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HSIC module operates in active state with all functions enabled, then communication performance is maintained, but electric current consumption increases
Solution Approach 1:
The HSIC module dynamically transitions between active state (all functions enabled) and suspend state (minimal functions enabled) based on communication activity detection. The controller monitors communication requests and adjusts the operational state accordingly, enabling the system to adapt its energy consumption to actual communication needs while maintaining performance when required.
Solution Approach 2:
The system changes operational parameters by transitioning the HSIC module between different power states. In the active state, all functions are enabled for optimal communication performance. When no communication requests are detected for a predetermined time, the system changes parameters by entering suspend state with minimal functions, thereby reducing electric current consumption while preserving the ability to resume full functionality when needed.
2Use of energy by moving object
If HSIC module transitions to suspend state to reduce power consumption, then electric current consumption decreases, but communication link maintenance requires minimal functions to remain active
Solution Approach 1:
The power management is segmented into distinct operational states (active and suspend states) with clear transition criteria. The controller divides the functionality into essential communication link maintenance functions that remain active in suspend state versus optional functions that can be disabled. This segmentation simplifies control logic by providing well-defined state transitions based on communication activity detection.
3Use of energy by moving object
If HSIC module transitions to power-off state, then battery consumption rate decreases, but turn-on/off control requires host active line management
Solution Approach 1:
The HSIC module employs self-service power management where the controller automatically detects communication requests and autonomously transitions between power states without requiring manual intervention. The system monitors its own communication activity and independently decides when to enter or exit power-off state, simplifying operation while achieving significant battery consumption reduction.
Data Source
AI summary
A High Speed Inter Chip (HSIC) system and method for minimizing power consumption by controlling the state of the HSIC module through a control line are provided. The method between a host and a slave includes transitioning, when no communication request exists for a first reference time in an active state where all functions of the HSIC modules are enabled, to a suspend state where least functions used for maintaining a communication link of the HSIC modules and transitioning, when no communication request exists for a second reference time in the suspend state, to a power-off state where the HSIC modules turn off. The HSIC communication method and apparatus are advantageous to minimize the electric current consumption of the HSIC consumption system.