MPC8541E PowerQUICC III Integrated Communications Processor Hardware Specification, Rev. 4.2
30
Freescale Semiconductor
Ethernet: Three-Speed, MII Management
Figure 14 shows the RBMII and RTBI AC timing and multiplexing diagrams.
Figure 14. RGMII and RTBI AC Timing and Multiplexing Diagrams
8.3
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
8.3.1
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 27.
Table 27. MII Management DC Electrical Characteristics
Parameter
Symbol
Conditions
Min
Max
Unit
Supply voltage (3.3 V)
OVDD
—3.13
3.47
V
Output high voltage
VOH
IOH = –1.0 mA
LVDD = Min
2.10
LVDD + 0.3
V
Output low voltage
VOL
IOL = 1.0 mA
LVDD = Min
GND
0.50
V
Input high voltage
VIH
—1.70
—
V
Input low voltage
VIL
—
0.90
V
GTX_CLK
tRGT
tRGTH
tSKRGT
TX_CTL
TXD[8:5]
TXD[7:4]
TXD[9]
TXERR
TXD[4]
TXEN
TXD[3:0]
(At Transmitter)
TXD[8:5][3:0]
TXD[7:4][3:0]
TX_CLK
(At PHY)
RX_CTL
RXD[8:5]
RXD[7:4]
RXD[9]
RXERR
RXD[4]
RXDV
RXD[3:0]
RXD[8:5][3:0]
RXD[7:4][3:0]
RX_CLK
(At PHY)
tSKRGT