In certain applications, the client-side GMII/MII datapath can be used as a true GMII/MII to connect externally off-device across a PCB. This external GMII/MII functionality is included in the HDL block level and is seamlessly delivered with the core by the AMD Vivado™ IP catalog. This extra logic required to accomplish this is described in this Appendix.
Note:
AMD Virtex™ 7 devices support
GMII at 3.3V or lower only in certain parts and packages; see the AMD Virtex™ 7 device documentation. AMD Zynq™
7000 SoC, AMD Kintex™ 7, and AMD
Artix™
7 devices support
GMII at 3.3V or lower.