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-output time tCO. 2. Compare the main features of 74-393 and 74-163 counters and construct an N-bit synchronous counter using 74-163(s). 3. Macrocells (MCs) are key components of Programmable Logic Device (PLD). Based on the MC logic schematic diagram below, please describe its functions.

作业2（郑修勇 201128015329021）.doc

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