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功能: 作为 ALU 的另一个输入操作数寄存器 ... 约束文件 (UCF - User Constraints File 或 XDC - Xilinx Design Constraints) 职责: 用于硬件实现 (FPGA 下载) 时,对设计进行约束,例如指定时钟频率,绑定顶层模块的输入输出端口到 FPGA 开发板的特定引脚 (例如 LED, 开关, 按键 ...
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