Electronic Design Automation

7.2.2. Scan design flow

Although conceptually scan design is not difficult to understand, the practice of inserting scan into a design to turn it into a scan design requires careful planning. This often requires many circuit modifications for which care must be taken not to disrupt the normal functionality of the circuit. In addition, many physical implementation details must be taken into consideration to guarantee that scan testing can be performed successfully. Finally, a good understanding of scan design, with respect to which scan cell design and scan architecture to use, is required to better plan in advance which scan design rules must be complied with and which debug and diagnose features must be included to facilitate simulation, debug, ...