USB Transceiver Switching for Remote Wake-Up During Charging
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Solution Overview
Problem
Existing systems that allow USB devices to charge in standby or hibernate modes often disable remote wake-up capabilities, preventing users from unplugging charging devices and reconnecting wake-up peripherals to activate the computer.
Innovation Solution
An apparatus and method that includes a USB transceiver port, a USB connector port, and control logic to disconnect the transceiver port during dedicated charging and reconnect upon detection of a remote wake-up device, enabling remote wake-up functionality while charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the USB connector port is connected to the transceiver port during dedicated charging mode, then remote wake-up functionality is enabled, but charging current cannot be properly supplied to the USB device
Solution Approach 1:
The USB connector port is segregated into two distinct operational modes: when a charging device is detected, the port connects to the dedicated charging circuit; when a remote wake-up device is detected, the port connects to the transceiver port. This segmentation allows each function to operate independently without interference, resolving the contradiction between enabling remote wake-up and maintaining reliable charging.
Solution Approach 2:
A detection circuit acts as an intermediary between the USB connector port and the two potential destinations (dedicated charging circuit and transceiver port). The detection circuit identifies the type of device connected and directs the port to the appropriate destination, enabling the system to switch between charging mode and remote wake-up mode based on device type, thus resolving the functional conflict.
2Reliability
If the USB connector port is disconnected from the transceiver port during dedicated charging mode, then charging reliability is maintained, but remote wake-up functionality is disabled
Solution Approach 1:
The connection configuration of the USB connector port is made dynamic rather than static. The port can dynamically switch between two states: connected to the dedicated charging circuit for reliable charging, or connected to the transceiver port for remote wake-up functionality. This dynamic adaptability allows the system to maintain charging reliability when needed while enabling remote wake-up capability when appropriate.
Solution Approach 2:
The USB connector port is designed with multi-functionality, serving both as a charging interface and a remote wake-up interface. Through the switching mechanism controlled by the detection circuit, the same physical port can universally support different device types and functions, resolving the contradiction between maintaining charging reliability and enabling remote wake-up versatility.
3Device complexity
If a single USB connector port is used for both charging and data communication, then device simplicity is maintained, but functional conflicts occur during mode switching
Solution Approach 1:
While maintaining a single physical USB connector port for simplicity, the internal connection paths are segmented into separate routes: one leading to the dedicated charging circuit and another leading to the transceiver port. The detection circuit determines which segment is activated based on the connected device type, preventing functional conflicts during mode switching while preserving external simplicity.
Solution Approach 2:
The detection circuit serves as an intermediary that manages the single USB connector port's dual functionality. It detects the device type and directs the port's connection to the appropriate destination, ensuring reliable mode switching without requiring multiple physical ports. This intermediary mechanism resolves the conflict between maintaining simple port structure and ensuring reliable functional switching.
Data Source
AI summary
An apparatus for remote wake-up during dedicated charging mode includes: a USB transceiver port; a USB connector port; a switch network coupling the USB transceiver port to the USB connector port; and control logic coupled to the switch network and operative to control the switch network to disconnect the USB transceiver port from the USB connector port during a dedicated charger operational mode and to connect the USB transceiver port to the USB connector port upon the detection of a potential remote wake-up condition.