（2）时序约束部分：输入输出信号与寄存器间的相互约束条件

时序约束篇

Within the FPGA design process, all internal elements are synchronous circuits, and delays and other timing parameters can be accurately estimated. However, the FPGA architecture does not have information about the timing relationships of external devices. Therefore, Timing constraints comprising essential requirements for proper functionality encompass several critical aspects that must be adhered to for successful implementation. To ensure proper operation, the timing constraints encompass several critical requirements, including:

1. FPGA输入端的数据时序规范（Input paths）
2. FP