One Wire Bus to RFFE Translation Controller
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Solution Overview
Problem
Existing bus interface systems in mobile user devices face challenges in integrating different bus protocols, such as one wire and multiwire protocols, which limits their universality and efficiency due to the need for multiple bus lines and separate power and clock signals.
Innovation Solution
A bus interface system that includes a translation bus controller capable of translating commands between pulse width modulation (PWM) and Mobile Industry Processor Interface (MIPI) RFFE bus protocols, allowing cross-over bus operations between master and slave controllers operating under different protocols, thereby integrating one wire and multiwire bus systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple bus lines are provided for different bus protocols, then communication functionality is improved, but the area available for pins and wires increases
Solution Approach 1:
The translation bus controller is designed to support multiple bus protocols (one-wire and multi-wire MIPI RFFE) through a single controller interface. It can translate between different protocols and perform both master and slave operations, allowing one bus interface to serve multiple communication functions that would otherwise require separate dedicated controllers and bus lines.
2Adaptability or versatility
If separate master and slave bus controllers are provided for different protocols, then protocol compatibility is improved, but device complexity increases
Solution Approach 1:
The translation bus controller consolidates multiple protocol handling capabilities into a single device. It can operate as both master and slave controllers for different protocols simultaneously, eliminating the need for separate dedicated controllers for each protocol while maintaining full protocol compatibility.
Solution Approach 2:
The translation bus controller acts as an intermediary between different bus protocols. It receives commands from a master controller using one protocol and translates them into the appropriate protocol for the slave device, enabling communication between systems that would otherwise be incompatible without requiring multiple separate controllers.
3Area of stationary object
If one wire bus protocol is used, then the number of bus lines is reduced, but integration with standardized MIPI RFFE interfaces becomes difficult
Solution Approach 1:
The translation bus controller serves as a mediator between the one-wire bus protocol and the standardized MIPI RFFE interface. It receives one-wire protocol commands, translates them into MIPI RFFE protocol commands, and communicates with slave devices using the standardized multi-wire interface, thereby enabling integration without compromising the space efficiency of one-wire communication.
Data Source
AI summary
This disclosure relates generally to bus interface systems for mobile user devices. In one embodiment, the bus interface system includes a first bus interface subsystem that operates in accordance with a one wire bus protocol, a second bus interface subsystem that operates in accordance with a Mobile Industry Processor Interface (MIPI) radio frequency front end (RFFE) bus protocol, and a translation bus controller that translates commands between the first bus interface subsystem and the second bus interface system. The translation bus controller is configured to implement cross over bus operations between a master bus controller that operates in accordance with in the one wire bus protocol and a slave bus controller in the second bus interface system. In this manner, the translation bus allows the master bus controller to be the master of different bus systems that operate in accordance with different bus protocols.