MDIO Interface

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

Document ID
UG1085
Release Date
2022-09-15
Revision
2.3 English

The management data input/output (MDIO) interface is for physical layer management. The MDIO is a single bi-directional 3-state signal going between the GEM and one or more PHYs. The GEM signals mdio_in, mdio_out, and mdio_en are provided to control a chip-level 3-state buffer.