Due to a limitation of transceiver channel mergining, Quartus® II software cannot fit multiple Triple Speed Ethernet IPs into a transceiver quad unless the gxb_powerdown signal is common to all IPs located within the same quad.
Type: Answers
Type: How-To
Area: Intellectual Property
IP Product: Triple Speed Ethernet MAC
Error (167005) : Can't assign I/O pad < pad name > to <pin name> because this causes failure in the placement of the other atoms in its associated channel
Description
Workaround/Fix
Export the gxb_powerdown signal to the top level, and drive the gxb_powerdown signals by a single source. To enable this option in the Triple Speed Ethernet MegaWizard™, enable "Export transceiver powerdown signal" in the PCS/Tranceiver Options tab -> Tranceiver Options. This option is always selected if the multichannel TSE variants are instanced.