Cadence PCB Best Practices

Working with Real-Time DFA Analysis

Issue link: https://resources.pcb.cadence.com/i/1180266

Contents of this Issue

Navigation

Page 19 of 28

Working with Design Partitions Design Partitioning October 2019 20 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. Final Steps The master designer should run the resequencer not only to update probe types but also to rename probes as a result of prefix-based names assigned when added in a partition. Probe density can be checked by running the density checker with parameters for unit area. Checking density as a function of the symbol instance is another option. Finally, the Testprep report should be reviewed for coverage and optimization. Often, there is opportunity to improve probe type allocation by increasing the center-to-center spacing. The Team Design Process The Workflow Manager user interface provides a view of all partition parameters and the interface to the set of workflow commands. Each team member has access to the Workflow Manager, but only the master designer has the ability to import, export, and retract partitions. The master design should consider the use of the following SPB 16.6 options before export. These options are designed to reduce the number of interrupts in the team design flow. Flexible Boundaries Designed to reduce the number of iterations between the master and partition designers, it is now possible for partition designers to move components or route signals outside their respective boundaries. The master designer controls whether boundaries are flexible by the enabling a new Workflow Manager option called Soft Boundary. This behavior is an all or none situation for the team. Partition designers do not have the ability to control this behavior. Prior to 16.6, components could always be moved outside the boundary of a partition to allow the designer more space to work in the partition, but when the partition was exported back to the master designer, components outside the boundary were ignored. When soft boundaries are enabled those components moved outside will now be saved during the export. Constraint Editing Partition designers are now permitted to edit Physical, Spacing and Electrical Constraints. The master designer controls whether constraint editing privileges are granted to the team by enabling a new Workflow Manager option called Edit_cns. Similar to the flexible boundary enhancement, this behavior is an all or none situation. Partition designers do not have the ability to control read/write behavior of constraint entry.

Articles in this issue

view archives of Cadence PCB Best Practices - Working with Real-Time DFA Analysis