1. Access the relevant reference books or technical data books and give accurate definitions for the following timing parameters: (1) propagation time tPD, (2) transition time tTD, (3) setup time tSU, (4) hold time tHD, and (5) clock-to

D触发器建立时间和保持时间检查，D触发器建立时间和保持时间检查-D flip-flop setup time and hold time checks, D flip-flop setup time and hold time checks