MPC8541ECVTAPE datasheet(29/84 Pages) FREESCALE

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MPC8541E PowerQUICC™ III Integrated Communications Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

Ethernet: Three-Speed, MII Management

Figure 13 shows the RBMII and RTBI AC timing and multiplexing diagrams.

Figure 13. 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

GMII, RGMII, TBI and RTBI are specified in Section 8.1, “Three-Speed Ethernet Controller (TSEC)

(10/100/1000 Mbps)—GMII/MII/TBI/RGMII/RTBI Electrical Characteristics.”

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

Output high voltage

VOH

IOH = –1.0 mA

LVDD = Min

2.10

LVDD + 0.3

Output low voltage

VOL

IOL = 1.0 mA

LVDD = Min

GND

0.50

Input high voltage

VIH

—1.70

—

Input low voltage

VIL

——

0.90

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

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