In certain applications, the client-side GMII datapath can be used as a true GMII to connect externally off-device across a PCB. This external GMII functionality is included in the HDL example design delivered with the core by the IP catalog for 1000BASE-X or 2500BASE-X designs. The extra logic required to accomplish this is described in this appendix.
Note:
AMD Virtex™ 7 devices support GMII
at 3.3 V or lower only in certain parts and packages; see the AMD Virtex™ 7 Device Documentation.AMD Zynq™ 7000, AMD Kintex™ 7, and AMD Artix™ 7 devices support GMII at 3.3V
or lower.