MPC8377E datasheet(24/126 Pages) FREESCALE

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MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

Ethernet: Enhanced Three-Speed Ethernet (eTSEC)

8.2

MII, RGMII, RMII, and RTBI AC Timing Specifications

The AC timing specifications for MII, RGMII, RMII, and RTBI are presented in this section.

8.2.1

MII AC Timing Specifications

This section describes the MII transmit and receive AC timing specifications.

8.2.1.1

MII Transmit AC Timing Specifications

Table 26 provides the MII transmit AC timing specifications.

Table 25. RGMII and RTBI DC Electrical Characteristics

Parameter

Symbol

Min

Max

Unit

Notes

Supply voltage 2.5 V

LVDD1

LVDD2

2.37

2.63

1, 2

Output high voltage

(LVDD1/LVDD2 = Min, IOH = –1.0 mA)

VOH

2.00

LVDD1/LVDD2 + 0.3

—

Output low voltage

(LVDD1/LVDD2 = Min, IOL = 1.0 mA)

VOL

GND – 0.3

0.40

—

Input high voltage

VIH

1.7

LVDD1/LVDD2 + 0.3

—

Input low voltage

VIL

–0.3

0.70

—

Input high current

(VIN = LVDD1, VIN = LVDD2)

IIH

—

–20

μA1, 2

Input low current

(VIN = GND)

IIL

–20

—

μA—

Note:

1 LV

DD1 supports eTSEC 1.

2 LV

DD2 supports eTSEC 2.

Table 26. MII Transmit AC Timing Specifications

At recommended operating conditions with LVDD of 3.3 V ± 5%.

Parameter

Symbol1

Min

Typical

Max

Unit

TX_CLK clock period 10 Mbps

tMTX

—

400

—

TX_CLK clock period 100 Mbps

tMTX

—40—

TX_CLK duty cycle

tMTXH/tMTX

—

TX_CLK to MII data TXD[3:0], TX_ER, TX_EN delay

tMTKHDX

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