MPC8548E datasheet(39/144 Pages) FREESCALE

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MPC8548E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 6

Freescale Semiconductor

Ethernet Management Interface Electrical Characteristics

Figure 19 provides the AC test load for eTSEC.

Figure 19. eTSEC AC Test Load

Figure 20 shows the RMII receive AC timing diagram.

Figure 20. RMII Receive AC Timing Diagram

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).”

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 36.

Table 36. MII Management DC Electrical Characteristics

Parameter

Symbol

Min

Max

Unit

Supply voltage (3.3 V)

OVDD

3.13

3.47

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

VOH

2.10

OVDD + 0.3

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

VOL

GND

0.50

Input high voltage

VIH

2.0

—

Input low voltage

VIL

—0.90

Output

Z0 = 50 Ω

LVDD/2

RL = 50 Ω

TSEC

n_TX_CLK

RXD[1:0]

tRMRDX

tRMR

tRMRH

tRMRR

tRMRF

CRS_DV

RX_ER

tRMRDV

Valid Data

MPC8548E Datasheet(PDF) 39 Page - Freescale Semiconductor, Inc

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