Industry Expert Blogs

PCI express Gen 4 implementation is marching towards the Gen 4 0.7 release. It’s important that not only physical layer delivers the 16 GT/s rate, but also the entire protocol stack should be capable of saturating the full allocated bandwidth. To saturate the full bandwidth, following two key features are gaining traction:

• 10-bit extended tag support
• Scaled flow control credits

In our earlier blog, we discussed about 10-bit extended tag. In this blog, we will discuss about the second feature scaled flow control credits. We will give a brief introduction of the feature to give a jump start to any one ramping up on the latest specifications, and also discuss corresponding verification challenges and solutions.

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