SDIO Bus Clock Power Management in Portable Terminals
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Solution Overview
Problem
Portable terminals experience high power consumption and reduced operating time due to a fixed clock in bus interfaces, which is inefficient for varying application throughputs.
Innovation Solution
A method and apparatus that control the operation clock of the SDIO bus in portable terminals by determining the required throughput for application programs and selectively adjusting the supply voltage, optimizing power management to minimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bus clock is fixed at maximum clock to achieve maximum throughput, then the data transmission speed is improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic clock frequency adjustment for the SDIO bus interface, transitioning from a fixed maximum clock to a variable clock that adapts to application requirements. The power controller dynamically changes the bus clock frequency based on the throughput needed by running applications, allowing the system to operate at lower frequencies for low-throughput applications and higher frequencies for high-throughput applications, thus resolving the contradiction between maintaining high productivity and reducing energy consumption.
Solution Approach 2:
The patent changes the operational parameters of the bus interface by adjusting the clock frequency based on application throughput requirements. The power controller monitors the throughput needs of running applications and modifies the bus clock frequency parameter accordingly, enabling the system to optimize the balance between data transmission speed and power consumption by varying this key parameter rather than maintaining a fixed value.
2Productivity
If the bus clock is fixed at maximum clock, then the data transmission capability is improved, but the operating time of the portable terminal is reduced
Solution Approach 1:
The patent implements dynamic clock frequency adjustment for the SDIO bus interface, transitioning from a fixed maximum clock to a variable clock that adapts to application requirements. The power controller dynamically changes the bus clock frequency based on the throughput needed by running applications, allowing the system to operate at lower frequencies for low-throughput applications and higher frequencies for high-throughput applications, thus resolving the contradiction between maintaining high productivity and reducing energy consumption.
Solution Approach 2:
The patent changes the operational parameters of the bus interface by adjusting the clock frequency based on application throughput requirements. The power controller monitors the throughput needs of running applications and modifies the bus clock frequency parameter accordingly, enabling the system to optimize the balance between data transmission speed and power consumption by varying this key parameter rather than maintaining a fixed value.
Data Source
AI summary
An apparatus and a method for power saving in a portable terminal are provided. The method for power saving in the portable terminal includes determining a throughput when processed by a bus, determining a throughput required for a program and selectively controlling a bus clock connected with a modem according to the determined throughput.