Major Enhancements for Clocking in Versal DFX Compared to UltraScale+ - 2021.1 English

Vivado Design Suite User Guide: Dynamic Function eXchange (UG909)

Document ID
Release Date
2021.1 English

This section covers notable changes in Versal clocking. Versal allows clock tile splitting among multiple RPs. However, this is taken care by the tool. User need to range only the clock sources like MMCM and BUFGs to the Pblock and DFX flow automatically pulls in the required clocking tiles for routing.

Figure Clock Tile Partition shows RCLK row and VNOC column sharing among multiple reconfigurable partitions. RCLK row sharing among two reconfigurable partitions allow sharing the clock region between two RPs (one above the RCLK and one below the RP). The VNOC tiles are also shared between multiple reconfigurable partitions. However, if more than two RPs compete to find clock routing solution in a single VNOC column, it might cause unroutable situation. If there are more than 2 RPs, try to keep a clock region gap between them so that internal clocks of all the RPs do not compete for solution in same VNOC tile.

Figure 1. Clock Tile Partition