MPC8548ECPXATHC datasheet(27/151 Pages) FREESCALE

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MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 9

Freescale Semiconductor

Enhanced Three-Speed Ethernet (eTSEC)

This section provides the AC and DC electrical characteristics for the enhanced three-speed Ethernet

controller. The electrical characteristics for MDIO and MDC are specified in Section 9, “Ethernet

Management Interface Electrical Characteristics.”

8.1

Enhanced Three-Speed Ethernet Controller (eTSEC)

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

Characteristics

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

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

(RGMII), reduced ten-bit interface (RTBI), and reduced media independent interface (RMII) signals

except management data input/output (MDIO) and management data clock (MDC). 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.

The GMII, MII, or TBI interface timing is compliant with the IEEE 802.3. The RGMII and RTBI interfaces

follow the Reduced Gigabit Media-Independent Interface (RGMII) Specification Version 1.3

(12/10/2000). The RMII interface follows the RMII Consortium RMII Specification Version 1.2

(3/20/1998). The electrical characteristics for MDIO and MDC are specified in Section 9, “Ethernet

Management Interface Electrical Characteristics.”

8.1.1

eTSEC DC Electrical Characteristics

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

attributes specified in Table 22 and Table 23. The RGMII and RTBI signals are based on a 2.5-V CMOS

interface voltage as defined by JEDEC EIA/JESD8-5.

Table 22. GMII, MII, RMII, and TBI DC Electrical Characteristics

Parameter

Symbol

Min

Max

Unit

Notes

Supply voltage 3.3 V

LVDD

TVDD

3.13

3.47

1, 2

Output high voltage (LVDD/TVDD = min, IOH = –4.0 mA)

VOH

2.40

LVDD/TVDD + 0.3

—

Output low voltage (LVDD/TVDD = min, IOL = 4.0 mA)

VOL

GND

0.50

—

Input high voltage

VIH

2.0

LVDD/TVDD + 0.3

—

Input low voltage

VIL

–0.3

0.90

—

Input high current (VIN = LVDD, VIN = TVDD)IIH

—40

A

1, 2, 3

Input low current (VIN = GND)

IIL

–600

—

A—

Notes:

1. LVDD supports eTSECs 1 and 2.

2. TVDD supports eTSECs 3 and 4.

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

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