MPC8540 datasheet(34/104 Pages) FREESCALE

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MPC8540 Integrated Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

Ethernet: Three-Speed,10/100, MII Management

Figure 15 shows the MII receive AC timing diagram.

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

3.13

3.47

Output high voltage

(OVDD = Min, IOH = –1.0 mA)

VOH

2.10

OVDD + 0.3

Output low voltage

(OVDD = Min, IOL = 1.0 mA)

VOL

GND

0.50

Input high voltage

VIH

1.70

—

Input low voltage

VIL

—0.90

Input high current

(OVDD = Max, VIN

1 = 2.1 V)

IIH

—40

μA

Input low current

(OVDD = Max, VIN = 0.5 V)

IIL

–600

—

μA

Note:

1.Note that the symbol VIN, in this case, represents the OVIN symbol referenced in Table 1 and Table 2.

RX_CLK

RXD[3:0]

tMRDXKH

tMRX

tMRXH

tMRXR

tMRXF

RX_DV

RX_ER

tMRDVKH

Valid Data

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