MPC8544E datasheet(24/117 Pages) FREESCALE

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MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5

Freescale Semiconductor

Enhanced Three-Speed Ethernet (eTSEC), MII Management

characteristics for MDIO and MDC are specified in Section 9, “Ethernet Management Interface Electrical

Characteristics.”

8.2

eTSEC DC Electrical Characteristics

All GMII, MII, TBI, RGMII, RTBI, RMII, and FIFO 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, RTBI,

RMII, and FIFO receiver may exceed the potential of the receiver’s power supply (that is, 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, TBI, RMII and FIFO DC Electrical Characteristics

Parameter

Symbol

Min

Max

Unit

Notes

Supply voltage 3.3 V

LVDD

TVDD

3.135

3.465

1, 2

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

VOH

2.4

—

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

VOL

—

0.5

—

Input high voltage

VIH

1.95

—

Input low voltage

VIL

—0.90

—

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

—40

μA

1, 2, 3

Input low current (VIN = GND)

IIL

–600

—

μA3

Notes:

1. LVDD supports eTSEC1.

2. TVDD supports eTSEC3.

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

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

Parameters

Symbol

Min

Max

Unit

Notes

Supply voltage 2.5 V

LVDD/TVDD

2.375

2.625

1, 2

Output high voltage (LVDD/TVDD = Min, IOH = –1.0 mA)

VOH

2.0

—

Output low voltage (LVDD/TVDD = Min, IOL = 1.0 mA)

VOL

—0.4

—

Input high voltage

VIH

1.70

—

Input low voltage

VIL

—0.7

—

Input current (VIN = 0, VIN = LVDD, VIN = TVDD)IIN

—±15

μA

1, 2, 3

Notes:

1. LVDD supports eTSEC1.

2. TVDD supports eTSEC3.

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

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