Slave Device Bus System Voltage Segmentation
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Solution Overview
Problem
Existing slave devices for serial synchronous full-duplex bus systems face limitations in transmission rate due to high voltage transistor performance issues and decreasing core voltages, which hinder fast data processing and increase response delays, especially in nanometer technologies.
Innovation Solution
A slave device design featuring a two-signal path approach, where one path is dedicated for data processing and the other for a fast clock signal connection, eliminating level shifting delays and minimizing clock-to-output delay by using a synchronization delay flip-flop in the medium voltage portion, thereby optimizing performance and reducing dependency on core voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If high voltage transistors are used to handle medium voltage bus signals, then voltage compatibility is achieved, but transistor performance deteriorates and response delay increases
Solution Approach 1:
The slave device is divided into two distinct voltage domains: a medium voltage portion (1.65V-5.5V) for bus interface operations and a low voltage portion (1V-2V) for core logic operations. This segmentation allows each portion to use transistors optimized for its specific voltage range, resolving the contradiction between voltage compatibility and transistor performance.
Solution Approach 2:
Level shifters are introduced as intermediary components between the medium voltage bus interface and the low voltage core logic. These level shifters translate signals between voltage domains, enabling high voltage compatibility at the interface while maintaining optimal low voltage performance in the core logic, thus resolving the transistor performance deterioration issue.
2Adaptability or versatility
If level shifting is implemented to interface between medium voltage bus and low voltage core logic, then voltage domain compatibility is achieved, but transmission rate is limited due to additional delay
Solution Approach 1:
The synchronization delay flip-flop performs preliminary timing alignment of data signals with the clock signal before they enter the core logic. By pre-synchronizing signals at the boundary between medium and low voltage portions, the system compensates for level shifter delays and maintains high transmission rates despite the presence of voltage domain interfaces.
Solution Approach 2:
The system dynamically adjusts timing parameters through the synchronization delay flip-flop to compensate for variable delays introduced by level shifters. This dynamic timing adjustment allows the system to maintain optimal data transmission rates across different operating conditions while preserving voltage domain compatibility.
3Use of energy by moving object
If core voltage is decreased to improve power efficiency, then energy consumption is reduced, but clock-to-output delay increases
Solution Approach 1:
The voltage segmentation architecture allows the core logic to operate at low voltage (1V-2V) for improved power efficiency while the bus interface operates at medium voltage (1.65V-5.5V) for fast signal transitions. The synchronization delay flip-flop compensates for any timing delays, enabling the system to achieve low power consumption without sacrificing clock-to-output performance.
Data Source
AI summary
A slave device for a serial synchronous full duplex bus system, which has a data input stage, a clock input stage, an interface logic, a synchronization delay flip-flop, and a data output stage. The slave device is manufactured using nanometer technologies. Also, a method for operating the slave device.