MPC8540CPX667JC datasheet(22/104 Pages) FREESCALE

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MPC8540 Integrated Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

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

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

This section provides the AC and DC electrical characteristics for three-speed, 10/100, and MII

management.

8.1 Three-Speed Ethernet Controller (TSEC)

(10/100/1Gb Mbps)—GMII/MII/TBI/RGMII/RTBI Electrical

Characteristics

The electrical characteristics specified here apply to all GMII (gigabit media independent interface), MII

(media independent interface), TBI (ten-bit interface), RGMII (reduced gigabit media independent

interface), and RTBI (reduced ten-bit interface) signals except MDIO (management data input/output) and

MDC (management data clock). The RGMII and RTBI interfaces are defined for 2.5 V, while the GMII,

MII, and TBI interfaces can be operated at 3.3 or 2.5 V. Whether the GMII, MII, or TBI interface is

operated at 3.3 or 2.5 V, the timing is compliant with the IEEE 802.3 standard. The RGMII and RTBI

interfaces follow the Hewlett-Packard reduced pin-count interface for Gigabit Ethernet Physical Layer

Device Specification Version 1.2a (9/22/2000). The electrical characteristics for MDIO and MDC are

specified in Section 8.4, “Ethernet Management Interface Electrical Characteristics.”

8.1.1 TSEC DC Electrical Characteristics

All GMII, MII, TBI, RGMII, and RTBI drivers and receivers comply with the DC parametric attributes

specified in Table 21 and Table 22. The potential applied to the input of a GMII, MII, TBI, RGMII, or

RTBI receiver may exceed the potential of the receiver’s power supply (i.e., a GMII driver powered from

a 3.6 V supply driving VOH into a GMII receiver powered from a 2.5 V supply). Tolerance for dissimilar

GMII driver and receiver supply potentials is implicit in these specifications. The RGMII and RTBI signals

are based on a 2.5 V CMOS interface voltage as defined by JEDEC EIA/JESD8-5.

Table 21. GMII, MII, and TBI DC Electrical Characteristics

Parameter

Symbol

Min

Max

Unit

Supply voltage 3.3 V

LVDD

3.13

3.47

Output high voltage

(LVDD = Min, IOH = –4.0 mA)

VOH

2.40

LVDD + 0.3

Output low voltage

(LVDD = Min, IOL = 4.0 mA)

VOL

GND

0.50

Input high voltage

VIH

1.70

LVDD + 0.3

Input low voltage

VIL

–0.3

0.90

Input high current

(VIN

1 = LV

DD)

IIH

—40

μA

Input low current

(VIN

1 = GND)

IIL

–600

—

μA

Note:

1.The symbol VIN, in this case, represents the LVIN symbol referenced in Table 1 and Table 2.

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