As digital logic systems become increasingly complex, the chips used in monolithic systems are evolving toward ultra-large scale and high-density designs. In large-scale digital systems, the overall system is built by combining various logical function modules. However, whether it's a sequential, combinatorial, or hybrid system, each functional module isn't continuously active. Instead, they operate cyclically based on the system's timing requirements. As the scale of digital systems grows, under the same speed conditions, the average utilization rate of these functional modules tends to decrease over time. This shift necessitates a move from traditional large-scale, high-density design approaches to more efficient resource utilization strategies, enabling larger-scale logic designs with limited resources. Reconfigurable computing technology offers a powerful solution by combining hardware efficiency with software programmability. It bridges the gap between microprocessors and ASICs, allowing flexibility in both spatial and temporal dimensions. This makes it ideal for applications requiring dynamic adaptation without sacrificing performance. Reconfigurability refers to the ability of an electronic system to dynamically alter its circuit structure while in operation. This is typically achieved through reprogramming or partial reprogramming of programmable logic devices within the system. With reconfigurable technology, systems can enjoy the benefits of both software and hardware implementations using only a minimal amount of additional hardware resources. Reconfiguration methods can be broadly categorized into static and dynamic reconfiguration based on the timing of the changes. 1.2.1 Static System Reconfiguration Static reconfiguration involves configuring the system’s logic functions before execution. This process is typically done once, as shown in Figure 1. The FPGA is reloaded with different configurations stored in memory, controlled by external logic, thereby changing the chip’s functionality. 1.2.2 Dynamic System Reconfiguration Dynamic reconfiguration allows for real-time configuration during system operation, as illustrated in Figure 2. For systems with time-dependent logic, the timing functions are not just switched between different regions of the chip but are dynamically constructed using cache logic resources. FPGAs with such capabilities allow quick global or local modifications through cache logic, accelerating the system's dynamic configuration via resource relocation and routing. Dynamic reconfiguration can be further divided into global and local types: (1) Global reconfiguration involves completely reconfiguring an entire FPGA or system. During this process, intermediate computation results must be saved in an external storage area until the new configuration is fully loaded. The previous and new configurations are independent of each other. (2) Local reconfiguration allows partial reconfiguration of the device or system while the rest continues to operate normally. This approach significantly reduces the scope and number of elements involved in the reconfiguration, leading to faster execution times. Historically, FPGAs like Xilinx’s XC6200 and Atmel’s AT6000 series were commonly used for dynamic reconfiguration research. These SRAM-based devices allowed individual units to be accessed separately, enabling local reconfiguration. Although this provided significant advantages, it also increased hardware size and power consumption. To achieve full real-time system reconfiguration, modern FPGAs such as Xilinx’s Virtex-4 series offer dynamic local reconfiguration capabilities. The core feature of FPGA-based local dynamic reconfiguration is the ability to decompose the system into functional or timing-based modules and perform localized reconfiguration as needed. This enables the implementation of large-scale timing systems with fewer hardware resources. Figure 3 illustrates a typical FPGA-based local dynamic reconfigurable system. As shown, the chip’s logic can be dynamically reconfigured in real time under the control of external logic, achieving system restructuring through layout and routing resource control. To effectively implement real-time dynamic reconfiguration, FPGAs must meet several structural requirements: (1) They must support reprogrammability and dynamic reconfiguration without disrupting the global or local logic operations. Traditional FPGAs store configuration data in external EPROMs, which have limitations such as needing to stop the entire system for reconfiguration, only allowing full reconfiguration, and losing the previous internal state. Modern dynamic reconfigurable FPGAs eliminate the need for a reset signal before reconfiguration, instead disabling the clock of part of the logic circuit, reconfiguring it, and then restoring the clock signal. (2) The internal configuration information of the FPGA should be symmetric, allowing any basic logic function to be configured at any location within the device. This enables the use of simple models to implement complex functions efficiently. The demonstration system includes various hardware components, each serving specific functions. These components work together to showcase the capabilities of FPGA-based reconfigurable systems, providing a practical example of how dynamic reconfiguration can be implemented and utilized in real-world applications. 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