Issue link: https://resources.pcb.cadence.com/i/1436019
Cadence Design Systems enables global electronic design innovation and plays an essential role in the creation of today's electronics. Customers use Cadence software, hardware, IP, and expertise to design and verify today's mobile, cloud and connectivity applications. www.cadence.com © 2014 Cadence Design Systems, Inc. All rights reserved worldwide. Cadence, the Cadence logo, Allegro, OrCAD, and SPECCTRA are registered trademarks and TimingVision is a trademark of Cadence Design Systems, Inc. PCI Express is a registered trademark of PCI-SIG. All others are properties of their respective holders. 3177 02/14 CY/ LX / PDF Another tip Munroe provides is to ensure that differential pairs (static and dynamic phases) are all matched prior to matching lengths for all of the signals in a byte lane. In addition, he and his colleague perform auto-routing up front to determine the board layer count. Also, Munroe found he could further increase tuning efficiency using the application modes within Allegro PCB Designer. He noted, "With their context-sensitive features, I have quick access to the many features available to complete the overall tuning process, including bundling/planning on these highly constrained networks. Additionally, I use application mode-sensitive "funckeys", which are user redefinable, to further shorten the overall tuning process." Summary As long-time users, Cavium's PCB designers are pleased with their bundle of Allegro PCB design tools, and will continue to learn about new solutions as they become available. "We're a high- quality shop—that's proven in the fact that a lot of our stuff is complete in one pass at the design, logic, and layout levels," said Munroe. "Where Allegro TimingVision comes into play, it's aptly named, the word vision, because that's what it gives you." " With Allegro TimingVision, everything is right there in front of you—this simple fact allows the routing process to be sped up dramatically, from the manual routing efforts we have seen that can take up to four weeks, down to four days. " Bill Munroe Principal PCB Designer, Cavium