Ethernet Management Interface Electrical Characteristics
Figure 19 provides the AC test load for eTSEC.
Output
Z = 50 Ω
0
LV /2
DD
R = 50 Ω
L
Figure 19. eTSEC AC Test Load
Figure 20 shows the RMII receive AC timing diagram.
t
t
RMRR
RMR
TSECn_TX_CLK
t
t
RMRF
RMRH
RXD[1:0]
CRS_DV
RX_ER
Valid Data
t
RMRDV
t
RMRDX
Figure 20. RMII Receive AC Timing Diagram
9 Ethernet Management Interface Electrical
Characteristics
The electrical characteristics specified here apply to MII management interface signals MDIO
(management data input/output) and MDC (management data clock). The electrical characteristics for
GMII, RGMII, RMII, TBI, and RTBI are specified in “Section 8, “Enhanced Three-Speed Ethernet
(eTSEC).”
9.1
MII Management DC Electrical Characteristics
The MDC and MDIO are defined to operate at a supply voltage of 3.3 V. The DC electrical characteristics
for MDIO and MDC are provided in Table 36.
Table 36. MII Management DC Electrical Characteristics
Parameter
Symbol
OV
Min
Max
Unit
Supply voltage (3.3 V)
Output high voltage (OV = Min, I = –1.0 mA)
3.13
2.10
GND
2.0
3.47
V
V
V
V
V
DD
V
OV + 0.3
DD
OH
OH
DD
Output low voltage (OV =Min, I = 1.0 mA)
V
OL
0.50
—
DD
OL
Input high voltage
Input low voltage
V
IH
V
—
0.90
IL
MPC8548E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 6
Freescale Semiconductor
39
FREESCALE [ Freescale ]
