MPC8349E datasheet(21/88 Pages) FREESCALE

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MPC8349E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10

Freescale Semiconductor

Ethernet: Three-Speed Ethernet, MII Management

This section provides the AC and DC electrical characteristics for three-speeds (10/100/1000 Mbps) and

MII management.

8.1

Three-Speed Ethernet Controller (TSEC)—

GMII/MII/TBI/RGMII/RTBI Electrical Characteristics

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

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

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

(MDIO) and management data clock (MDC). The MII, GMII, and TBI interfaces are defined for 3.3 V,

and the RGMII and RTBI interfaces can operate at 3.3 or 2.5 V. 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 8.3, “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 19 and Table 20. The potential applied to the input of a GMII, MII, TBI, RGMII, or

RTBI receiver may exceed the potential of the receiver power supply (that is, a RGMII driver powered

from a 3.6-V supply driving VOH into a RGMII receiver powered from a 2.5-V supply). Tolerance for

dissimilar RGMII 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 19. GMII/TBI and MII DC Electrical Characteristics

Parameter

Symbol

Conditions

Min

Max

Unit

Supply voltage 3.3 V

LVDD

—

2.97

3.63

Output high voltage

VOH

IOH = –4.0 mA

LVDD = Min

2.40

LVDD +0.3

Output low voltage

VOL

IOL = 4.0 mA

LVDD = Min

GND

0.50

Input high voltage

VIH

——

2.0

LVDD +0.3

Input low voltage

VIL

—

–0.3

0.90

Input high current

IIH

VIN

1 = LV

—40

μA

Input low current

IIL

VIN

1 = GND

–600

—

μA

Notes:

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

2. GMII/MII pins not needed for RGMII or RTBI operation are powered by the OVDD supply.

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