I/O Multiplexer Module for Flexible Chip Layout
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Solution Overview
Problem
Conventional chip designs face limitations in flexibility and space efficiency due to the need for function blocks to be close to I/O devices, which can lead to operational errors and reduced chip density, especially with high-speed signals where timing is critical and varies with process, temperature, and voltage.
Innovation Solution
A system that includes an I/O multiplexing module controlled by a single controller, allowing for flexible placement of function blocks and using re-clocking devices to synchronize signals with a system clock, eliminating the need for precise spatial arrangement of function blocks relative to I/O devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If function blocks are placed close to I/O devices to ensure timing predictability, then signal timing reliability is improved, but chip design flexibility and space utilization deteriorate
Solution Approach 1:
The patent divides the chip into multiple regions with function blocks distributed throughout, rather than requiring all function blocks to be clustered near I/O devices. The multiplexer system segments the signal routing paths, allowing function blocks to be placed in optimal locations for their specific functions while maintaining timing requirements through controlled signal switching.
Solution Approach 2:
The patent introduces a multiplexer as an intermediary device between function blocks and I/O devices. This multiplexer acts as a mediator that receives signals from multiple function blocks and routes them to the appropriate I/O device, or receives input signals and distributes them to the correct function blocks, thereby decoupling the spatial relationship between function blocks and I/O devices while maintaining signal integrity and timing requirements.
2Reliability
If function blocks are placed close to I/O devices to maintain timing relationships, then operational errors are reduced, but chip density and space efficiency deteriorate
Solution Approach 1:
The patent implements a universal multiplexer system that serves multiple function blocks and I/O devices simultaneously. The multiplexer can dynamically route signals between any connected function block and any connected I/O device, making the system multi-functional and adaptable to different operational modes. This universality allows function blocks to be placed throughout the chip rather than being constrained to specific locations near I/O devices.
3Ease of operation
If conventional multiplexer systems are used to control signal transmission, then signal routing control is achieved, but device complexity and space requirements increase
Solution Approach 1:
The patent merges the control functions for multiple signal paths into a single multiplexer unit. Instead of requiring separate control circuits for each function block-I/O device pair, the multiplexer consolidates these control functions, reducing the overall complexity of the control system while maintaining the ability to route signals between multiple function blocks and I/O devices.
Data Source
AI summary
A system (e.g., a chip) includes first and second function blocks (e.g., function blocks) coupled to an input/output (I/O) device (e.g., a bi-directional pin or pad) via a multiplexing module. The multiplexing module can be used for both input and output of signals between the function blocks and the I/O device. Optionally, a re-clocking system is coupled to the function blocks, the I/O device, and the multiplexing module. The re-clocking system re-clocks one or more signals being input into the multiplexing module so that they are timed correctly for input or output from the system.