Datasheet
Electrical characteristics
i.MX 8QuadXPlus and 8DualXPlus Automotive and Infotainment Applications Processors, Rev. 0, 11/2018
PRELIMINARY NXP Semiconductors72
4.10.5.1 RGMII
4.10.5.1.1 No-Internal-Delay mode
This mode corresponds to the RGMIIv1.3 specification.
Figure 33. RGMII timing diagram—No-Internal-Delay mode
4.10.5.1.2 Internal-delay mode
This mode corresponds to RGMIIv2.0 specification. The interface is still operating at 2.5 V. 1.5 V is not
supported.
Table 63. RGMII timings—No-Internal-Delay mode
ID Parameter Min Typ Max Unit
TXC / RXC frequency — — 125 MHz
t1 Clock cycle 7.2 8 8.8 ns
t2 Data to clock output skew -500 — 500 ps
t3 Data to clock input skew
1(1)
1
This implies that PC board design requires clocks to be routed such that an additional trace delay of greater than 1.5 ns and
less than 2.0 ns is added to the associated clock signal.
1—2.6ns