SCI Interface Mode Control for Reset-Free Tx/Rx Switching
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Solution Overview
Problem
Existing semiconductor devices with serial communication interfaces (SCI) face challenges in efficiently switching between transmit and receive modes without requiring standby time, especially in clock synchronous modes, leading to difficulties in data transfer and processing efficiency.
Innovation Solution
A semiconductor device with an interface circuit that includes a register to specify an operation enabled state and a mode control circuit to change between transmit and receive modes without standby time, allowing for seamless switching between modes using a synchronous clock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the SCI switches between transmit and receive modes using traditional reset methods, then mode switching is achieved, but standby time is required and processing efficiency decreases
Solution Approach 1:
The mode control circuit prepares and switches between transmit and receive modes in advance without requiring the SCI to be reset, eliminating standby time. The circuit maintains operational readiness by pre-configuring mode switching capabilities, allowing immediate transition between states.
Solution Approach 2:
The interface circuit implements dynamic mode switching where the mode control circuit can change between transmit and receive modes during operation without resetting the SCI. This dynamic capability allows the system to adapt modes in real-time based on communication needs, improving productivity while minimizing time loss.
2Adaptability or versatility
If the SCI performs simultaneous transmit and receive operations, then communication versatility is improved, but mode switching complexity increases
Solution Approach 1:
The mode control circuit is designed to handle multiple communication modes (transmit only, receive only, simultaneous transmit and receive) through a single unified control mechanism. This universal approach allows the interface circuit to perform various communication functions while keeping the control logic integrated and manageable.
Solution Approach 2:
The control circuit uses feedback from the operation enabled state register to automatically adjust mode switching. By monitoring the current operational state and using this feedback for mode control, the system achieves versatile communication capabilities while reducing the complexity of manual mode management.
3Ease of operation
If the SCI is reset when switching between transmit and receive modes, then mode switching is achieved, but processing efficiency and system responsiveness decrease
Solution Approach 1:
The mode control function is extracted from the main SCI operation, allowing mode switching to be handled independently without resetting the entire SCI. This separation enables simple mode transitions while maintaining the continuous operation of the communication interface, thereby preserving system responsiveness.
Solution Approach 2:
The mode control circuit performs self-service by automatically switching between transmit and receive modes based on the operation enabled state without requiring external reset commands. This autonomous mode management simplifies operation while maintaining high productivity and system responsiveness.
Data Source
AI summary
An SCI can perform transmission only or reception only, however, it is necessary to reset the SCI when transmission and reception is switched to transmission only or to reception only. A semiconductor device includes an interface circuit which performs a sequential communication of transmit or receive according to a synchronous clock. The interface circuit includes a register to specify an operation enabled state which is at least one of a transmit state and a receive state, and a mode control circuit to change at least one mode of transmit or receive in the operation enabled state.