MPC8313E datasheet(23/88 Pages) FREESCALE

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MPC8313E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 0

Freescale Semiconductor

Ethernet: Three-Speed Ethernet, MII Management

This section provides the AC and DC electrical characteristics for three-speed, 10/100/1000, and MII

management.

8.1

Enhanced Three-Speed Ethernet Controller (eTSEC)

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

Characteristics

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

(reduced gigabit media independent interface), SGMII (serial gigabit media independent interface), and

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

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

RTBI interfaces can be operated 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 RGMII, SGMII, RMII, and RTBI drivers and receivers comply with the DC parametric attributes

specified in Table 22 and Table 23. The potential applied to the input of a MII, RGMII, SGMII, or RTBI

receiver may exceed the potential of the receiver’s 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 22. MII/RGMII/RTBI (When Operating at 3.3V) DC Electrical Characteristics

Parameter

Symbol

Conditions

Min

Max

Unit

Supply voltage 3.3 V

LVDDA/LVDDB

—

2.97

3.63

Output high voltage

VOH

IOH = –4.0 mA

LVDDA or LVDDB = Min

2.40

LVDDA + 0.3

LVDDB + 0.3

Output low voltage

VOL

IOL = 4.0 mA

LVDDA or LVDDB = Min

VSS

0.50

Input high voltage

VIH

——

2.0

LVDDA + 0.3

LVDDB + 0.3

Input low voltage

VIL

—

–0.3

0.90

Input high current

IIH

VIN

1 = LV

DDA or LVDDB

—40

μA

Input low current

IIL

VIN

1 = VSS

–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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