Single Wire Interface for Peripheral Power Control
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Solution Overview
Problem
Current information handling systems, particularly those using the SFF-8654 interconnect standard, lack support for power control commands necessary for efficient operation of peripheral devices, limiting their configuration and firmware updates over a single wire interface.
Innovation Solution
A single wire interface (SWI) is introduced to couple a logic circuit on a planar board with a microcontroller in a peripheral interface device, enabling bidirectional communication for power control commands, firmware updates, and configuration of peripheral devices, applicable to various interconnect standards to minimize cable conductors and pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single wire interface is used to couple the planar board with the peripheral interface device, then the number of cable conductors and pins is minimized, but the system lacks support for power control commands necessary for efficient operation of peripheral devices
Solution Approach 1:
The single wire interface is designed to perform multiple functions including data communication, power control commands, and device configuration. The interface logic circuit interprets different signal states and protocols on the single wire to enable diverse operations such as firmware updates, power state transitions, and operational parameter configuration, making the simplified interface equally versatile for control and management tasks
2Productivity
If the single wire interface supports multiple functions including power control commands, then power management efficiency is improved, but the interface complexity increases
Solution Approach 1:
The peripheral interface device includes an interface logic circuit that autonomously interprets and responds to commands on the single wire interface without requiring complex external control logic. The device self-manages power state transitions, configuration updates, and communication protocols, reducing the need for complex interface management hardware while maintaining efficient power control capabilities
Data Source
AI summary
An information handling system includes a planar board and a peripheral interface device. The planar board includes a central processing unit, a baseboard management controller, and an interface logic circuit. The peripheral interface device includes a microcontroller and a serial communication interface device. The peripheral interface device is coupled to a peripheral device. The information handling system also includes an interconnect to couple signals from the planar board to the peripheral interface device. The interconnect includes a single wire to couple first information from the interface logic circuit to the peripheral interface device and to couple second information from the serial communication interface device to the interface logic circuit. The first information includes a first power control command.