Timing Constraints

The GMAC must be constrained so as to satisfy the timings of standards shown below and in MII Mode, in MAX corner.

Table 1. GMAC Signals Relative to GMDC
Symbol	Parameter	Min	Max	Unit
GMAC₁	Setup for GMDIO from GMDC rising	10	–	ns
GMAC₂	Hold for GMDIO from GMDC rising	10	–
GMAC₃	GMDIO toggling from GMDC falling	0⁽¹⁾	10⁽¹⁾

Note: 1. For GMAC output signals, min and max access time are defined. The min access time is the time between the GMDC falling edge and the signal change. The max access timing is the time between the GMDC falling edge and the signal stabilizes. The figure below illustrates min and max accesses for GMAC₃.

Figure 1. Min and Max Access Time of GMAC Output Signals