Ease and automate timing closure
Timing closure is one of the most challenging stages in the implementation of advanced system-on-chip (SoC) designs. Routing congestion, long interconnect paths, resistive metal layers, and clock‑distribution limitations all contribute to timing failures that can delay tape‑out. Arteris network‑on‑chip (NoC) technology helps prevent these issues by reducing global wire counts, minimizing congestion, and simplifying the physical implementation flow. With Arteris FlexNoC physical IP, designers can visualize timing-sensitive paths earlier in the design cycle, identify congestion hotspots, and address potential violations before entering the complete back-end physical design phase.Eliminating wire routing congestion
Traditional interconnect structures, such as OCP crossbars, create dense routing regions that consume upper metal layers and force timing‑critical paths onto more resistive layers. In contrast, Arteris FlexNoC significantly reduces wire count, resulting in cleaner routes, fewer detours, and lower delay. Customer designs consistently show that replacing a monolithic crossbar with FlexNoC eliminates severe congestion, even when both systems use the same protocol.
The traditional OCP crossbar on the left has pronounced routing congestion. The same IP with fewer wires due to use of Arteris FlexNoC interconnect IP has no routing congestion. The protocols are OCP for both.
Source: Arteris customer design.
How routing congestion causes timing closure issues
As upper metal layers fill up, EDA routers push long or timing‑critical wires onto narrower, more resistive middle and lower layers. Increased resistance dramatically slows signal propagation, making it more challenging to meet frequency targets.
Congestion also forces routing detours around blocked regions, lengthening paths and increasing signal delay proportional to the extra wire length. This compounds timing challenges across the design.
These effects increase susceptibility to Vdroop, clock skew, clock-tree imbalance, and global distribution delays, all of which make timing convergence harder to achieve.
Timing closure challenges lead to missed frequencies
When a design cannot meet its target frequency, back-end engineers typically insert repeater registers to break long paths into multiple pipeline stages. While effective, these additional registers consume area and power and increase pipeline complexity.
In severe cases, persistent timing failures can delay schedule milestones, force architectural compromises, or require substantial floorplan revisions.
In summary
Arteris NoC technology addresses timing‑closure challenges at their source by reducing routing congestion, shortening interconnect paths, and enabling early visibility into critical timing risks. FlexNoC physical IP further enhances convergence by providing physical‑aware insights that support predictable, high‑frequency SoC design.
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