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Clock meshes are used in state-of-the-art designs to construct clock routing in contrast to clock trees in older design. This shift in clock tree construction methodology is motivated by the fact that meshes cope better with variability effects. How do you use SPICE simulations to measure the skew of tree routing versus grid clock routing while taking variability effects into consideration. Can you extend your study to non-tree routings, i.e., clock trees with added short cuts? Also can you include delay comparison between tree and non-tree structures?
This paper, using an example design, demonstrates how to meet challenging performance, latency and bandwidth goals by using the DesignWare Interconnect Fabric for the ARM AMBA 3 AXI while minimizing the total area, power consumption and number of top-level wires. The paper also studies the design requirements and examines the optimization features of the DesignWare Interconnect Fabric used to meet the stringent timing requirements. Detailed technical analysis is provided for the selected architecture, pipelining mode, arbitration scheme and the slave visibility feature employed to reach timing closure for the links with demanding performance requirements. Final results are presented based on the hybrid architecture of the DesignWare Interconnect Fabric used to optimize the infrastructure resulting in a reduction in area, power and routing congestion.