Calibre
Calibre Auto-Waivers
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Waivers have long been essential in design; they allow certain verification results to be accepted despite technical violations.
Without them, distinguishing between permissible errors and actual problems becomes difficult, especially when design ownership changes hands—whether from person to person, group to group, or company to company. Without waivers, the end designer would need to research and re-waive each result found in the IP.
With waivers, those results can be disregarded, enabling focus on issues that truly need resolution.
The Calibre Automatic Waivers tool facilitates this process by allowing IP creators to pass waived DRC and other verification results to end users.
The course covers both perspectives: the IP designer issuing waivers and the end designer using the IP with those waivers.
Hands-on lab exercises will reinforce lecture topics and give you experience with tool usage. This course uses the powerful Calibre DESIGNrev layout viewer in all labs.
- Knowledge of IC layout techniques and procedures
- Using Calibre nmDRC course or a working knowledge of Calibre nmDRC
- Familiarity with UNIX/Linux
PRIMARY COURSE TOPICS
What You’ll Learn
- Describe the data and process flow for a typical Calibre Automatic Waivers job
- Run DRC and export waivers from Calibre RVE
- Write basic Waiver Criteria, Waiver Cells, and Waiver Setup files
- Understand how Waiver Criteria works to allow some tolerance for various waiver situations
- Invoke Calibre waivers from the command line and from the Calibre Interactive graphical user interface
- Use the Calibre Interactive GUI to specify waiver task options
- Use Rule Checksums in calibre -waiver
- View physical verification results in the flexible Calibre Results Viewing Environment (RVE) tool
- Use the drc_waiv_asc2gds utility
Throughout this course, extensive hands-on lab exercises provide you with practical experience using the software. Hands-on lab topics include:
- Running DRC and waiving an error results in a cell
- Exporting (embedding) the generated waiver shape to a cell in your design.
- Viewing waiver data and its various accompanying texts
- Testing the results of using the various Checksum functionalities provided with Automatic Waivers
- Using the drc_waiv_asc2gds utility