MPC8314VRADDA datasheet(23/101 Pages) FREESCALE

23 / 101 page

MPC8314E PowerQUICC II Pro Processor Hardware Specifications, Rev. 2

Freescale Semiconductor

Ethernet: Three-Speed Ethernet, MII Management

9.1

eTSEC (10/100/1000 Mbps)—MII/RMII/RGMII/RTBI Electrical

Characteristics

The electrical characteristics specified here apply to all the media-independent interface (MII), reduced

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

(MDIO) and management data clock (MDC). The MII and RMII is defined for 3.3 V, while the RGMII,

and RTBI can operate at 2.5 V. The RGMII and RTBI 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 9.3, “Ethernet Management

Interface Electrical Characteristics.”

9.1.1

MII, RMII, RGMII, and RTBI DC Electrical Characteristics

All MII, RMII drivers and receivers comply with the DC parametric attributes specified in Table 23 for

3.3-V operation and RGMII, RTBI drivers and receivers comply with the DC parametric attributes

specified in Table 24. The RGMII and RTBI signals are based on a 2.5 V CMOS interface voltage as

defined by JEDEC EIA/JESD8–5.

NOTE

eTSEC should be interfaced with peripheral operating at same voltage level.

Table 23. MII/RMII (When Operating at 3.3 V) DC Electrical Characteristics

Parameter

Symbol

Conditions

Min

Max

Unit

Supply voltage 3.3 V

LVDD

——

3.0

3.6

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

VSS

0.50

Input high voltage

VIH

——

2.1

LVDD + 0.3

Input low voltage

VIL

—

–0.3

0.90

Input high current

IIH

VIN

1 = LVDD

—

A

Input low current

IIL

VIN

1 = VSS

–600

—

A

Note:

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

Table 24. RGMII/RTBI (When Operating at 2.5 V) DC Electrical Characteristics

Parameters

Symbol

Conditions

Min

Max

Unit

Supply voltage 2.5 V

LVDD

—

2.37

2.63

Output high voltage

VOH

IOH = –1.0 mA

LVDD = Min

2.00

LVDD + 0.3

Output low voltage

VOL

IOL = 1.0 mA

LVDD = Min

VSS– 0.3

0.40

Input high voltage

VIH

—

LVDD = Min

1.7

LVDD + 0.3

Input low voltage

VIL

—

LVDD =Min

–0.3

0.70

Input high current

IIH

VIN

1 = LVDD

—

A

Input low current

IIL

VIN

1 = VSS

–15

—

A

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