How should the powerdown conduit on the IP Compiler for PCI Express be used?

Description

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:

1. Tie the gxb_powerdown signal to zero to enable the RX transceiver offset cancellation process.
2. Drive the pll_powerdown signal with the inverse of the active-low signal pcie_rstn.