Ethernet: Three-Speed,10/100, MII Management
Figure 15 shows the MII receive AC timing diagram.
tMRXR
tMRX
RX_CLK
tMRXF
Valid Data
tMRXH
RXD[3:0]
RX_DV
RX_ER
tMRDVKH
tMRDXKH
Figure 15. MII Receive AC Timing Diagram
8.4 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, TBI and RTBI are specified in Section 8.1, “Three-Speed Ethernet Controller (TSEC)
(10/100/1Gb Mbps)—GMII/MII/TBI/RGMII/RTBI Electrical Characteristics.”
8.4.1 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 33.
Table 33. MII Management DC Electrical Characteristics
Parameter
Symbol
Min
Max
Unit
Supply voltage (3.3 V)
OVDD
VOH
3.13
2.10
3.47
V
V
Output high voltage
OVDD + 0.3
(OVDD = Min, IOH = –1.0 mA)
Output low voltage
VOL
GND
0.50
V
(OVDD = Min, IOL = 1.0 mA)
Input high voltage
Input low voltage
VIH
VIL
IIH
1.70
—
—
0.90
40
V
V
Input high current
(OVDD = Max, VIN 1 = 2.1 V)
—
μA
Input low current
IIL
–600
—
μA
(OVDD = Max, VIN = 0.5 V)
Note:
1.Note that the symbol VIN, in this case, represents the OVIN symbol referenced in Table 1 and Table 2.
MPC8540 Integrated Processor Hardware Specifications, Rev. 4
34
Freescale Semiconductor
FREESCALE [ Freescale ]
