MPC8544E datasheet(42/117 Pages) FREESCALE

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MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5

Freescale Semiconductor

Ethernet Management Interface Electrical Characteristics

Ethernet Management Interface Electrical

Characteristics

The electrical characteristics specified here apply to MII management interface signals MDIO

(management data input/output) and MDC (management data clock). The electrical characteristics for

GMII, RGMII, RMII, TBI, and RTBI are specified in “Section 8, “Enhanced Three-Speed Ethernet

(eTSEC), MII Management.”

9.1

MII Management DC Electrical Characteristics

The MDC and MDIO are defined to operate at a supply voltage of 3.3 V. The DC electrical characteristics

for MDIO and MDC are provided in Table 40.

9.2

MII Management AC Electrical Specifications

Table 41 provides the MII management AC timing specifications.

Table 40. MII Management DC Electrical Characteristics

Parameter

Symbol

Min

Max

Unit

Notes

Supply voltage (3.3 V)

OVDD

3.135

3.465

—

Output high voltage (OVDD = Min, IOH = –1.0 mA)

VOH

2.10

3.60

—

Output low voltage (OVDD = Min, IOL = 1.0 mA)

VOL

GND

0.50

—

Input high voltage

VIH

1.95

—

Input low voltage

VIL

—0.90

—

Input high current (OVDD = Max, VIN = 2.1 V)

IIH

—40

μA1

Input low current (OVDD = Max, VIN = 0.5 V)

IIL

–600

—

μA—

Note:

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

Table 41. MII Management AC Timing Specifications

At recommended operating conditions with OVDD is 3.3 V ± 5%.

Parameter/Condition

Symbol1

Min

Typ

Max

Unit

Notes

MDC frequency

fMDC

—2.5

—

MHz

MDC period

tMDC

—400

—

MDC clock pulse width high

tMDCH

—

MDC to MDIO delay

tMDKHDX

(16 × tplb_clk) – 3

—

(16 × tplb_clk) + 3

3, 4

MDIO to MDC setup time

tMDDVKH

5—

—

MDIO to MDC hold time

tMDDXKH

0—

—

MDC rise time

tMDCR

——

—

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