Electronic Design Automation

7.2.1. Scan design rules

To implement scan into a design, the design must comply with a set of scan design rules [heung 1997]. In addition, certain design styles must be avoided, because they may limit the fault coverage that can be achieved. A number of scan design rules that are required to successfully use scan and achieve the target fault coverage goal are listed in Table 7.1. In this table, a possible solution is recommended for each scan design rule violation. Scan design rules that are labeled “avoid” must be repaired throughout the shift and capture operations. Scan design rules that are labeled “avoid during the shift” must be fixed only during the shift operation. Detailed descriptions are provided for some critical scan design rules. ...