MPC8378ECVRALDA datasheet(36/126 Pages) FREESCALE

36 / 126 page

MPC8378E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2

Freescale Semiconductor

Ethernet: Enhanced Three-Speed Ethernet (eTSEC)

Figure 18 shows the RMII receive AC timing diagram.

Figure 18. RMII Receive AC Timing Diagram

8.4

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).

Figure 19 provides the AC test load for eTSEC.

Figure 19. eTSEC AC Test Load

8.4.1

MII Management DC Electrical Characteristics

The MDC and MDIO are defined to operate at a supply voltage of 2.5 V or 3.3 V. The DC electrical

characteristics for MDIO and MDC are provided in Table 35 and Table 36.

Table 35. MII Management DC Electrical Characteristics When Powered at 2.5 V

Parameter

Conditions

Symbol

Min

Max

Unit

Supply voltage (2.5 V)

—

LVDD1

2.37

2.63

Output high voltage

IOH = –1.0 mA

LVDD1 = Min

VOH

2.00

LVDD1 + 0.3

Output low voltage

IOL = 1.0 mA

LVDD1 = Min

VOL

GND – 0.3

0.40

Input high voltage

—

LVDD1 = Min

VIH

1.7

—

Input low voltage

—

LVDD1 = Min

VIL

–0.3

0.70

Input high current

VIN = LVDD1

IIH

—20

μA

Input low current

VIN = LVDD1

IIL

–15

—

μA

REF_CLK

RXD[1:0]

tRMRDX

tRMR

tRMRH

tRMRR

tRMRF

CRS_DV

RX_ER

tRMRDV

Valid Data

Output

Z0 = 50 Ω

LVDD/2

RL = 50 Ω

MPC8378ECVRALDA Datasheet(PDF) 36 Page - Freescale Semiconductor, Inc

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