Electrical characteristics
3.11 Ethernet interface, Ethernet management interface 1 and 2,
IEEE Std 1588™
This section provides the AC and DC electrical characteristics for the Ethernet controller
and the Ethernet management interfaces.
3.11.1 SGMII electrical specifications
See SGMII interface.
3.11.2 RGMII electrical specifications
This section discusses the electrical characteristics for the RGMII interface.
3.11.2.1 RGMII DC electrical characteristics
This table shows the DC electrical characteristics for the RGMII interface.
Table 31. RGMII DC electrical characteristics(LVDD = 2.5 V)3
Parameters
Input high voltage
Input low voltage
Input current (LVIN= 0 V or LVIN= LVDD)
Output high voltage (LVDD = min, IOH = -1.0 mA)
Symbol
VIH
VIL
IIH
VOH
Min
1.70
—
-50
2.00
Max
—
0.70
+50
LVDD + 0.3
Unit
V
V
μA
V
Output low voltage (LVDD = min, IOL = 1.0 mA)
VOL
GND - 0.3
0.40
V
1. The min VILand max VIH values are based on the respective min and max LVIN values found in Table 3.
2. The symbol LVIN, in this case, represents the LVIN symbol referenced in Recommended operating conditions.
3. For recommended operating conditions, see Table 3.
Notes
1
1
2
—
—
3.11.2.2 RGMII AC timing specifications
This table presents the RGMII AC timing specifications.
Table 32. RGMII AC timing specifications (LVDD = 2.5 V)8
Parameter/Condition
Symbol1
Min
Typ
Max
Data to clock output skew (at transmitter)
Data to clock input skew (at receiver)
tSKRGT_TX
-750
0
tSKRGT_RX
1.0
—
1000
2.6
Unit
ps
ns
Notes
7, 9
2
Clock period duration
tRGT
7.2
8.0
8.8
ns
3
Table continues on the next page...
QorIQ T2080 Data Sheet, Rev. 3, 03/2018
NXP Semiconductors
73