A new conduit has been introduced in the 12.1 version of the IP compiler for PCI Express® in Qsys called powerdown. This conduit contains the gxb_powerdown and pll_powerdown signals.
These signals were previously contained in the pipe_ext conduit (see related solution). You should export this interface and connect these signals as follows:
- Tie the
gxb_powerdownsignal to zero to enable the RX transceiver offset cancellation process.
- Drive the
pll_powerdownsignal with the inverse of the active-low signal