Currently CDC for user -> HBM datapath is in the DFX region which makes it possible for timing failures on the non-scalable HBM clock in the DFX region. To ensure timing failure is not possible for user designs in the DFX region, we must clock the entire DFX region from the scalable clock and therefore move the CDC out of the DFX and into the strip between HBM_NMUs and the DFX region. This requires
- rearchitecting the CDC to use LUTRAM
- swapping the order of DFX decoupler and CDC
Currently CDC for user -> HBM datapath is in the DFX region which makes it possible for timing failures on the non-scalable HBM clock in the DFX region. To ensure timing failure is not possible for user designs in the DFX region, we must clock the entire DFX region from the scalable clock and therefore move the CDC out of the DFX and into the strip between HBM_NMUs and the DFX region. This requires