MPC8568E datasheet(39/139 Pages) FREESCALE

Teilenummer	MPC8568E

Bauteilbeschribung	MPC8568E/MPC8567E PowerQUICC III Integrated Processor Hardware Specifications

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MPC8568E/MPC8567E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1

Freescale Semiconductor

Ethernet Interface and MII Management

Figure 18 shows the RGMII and RTBI AC timing and multiplexing diagrams.

Figure 18. RGMII and RTBI AC Timing and Multiplexing Diagrams

8.2.7

RMII AC Timing Specifications

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

8.2.7.1

RMII Transmit AC Timing Specifications

The RMII transmit AC timing specifications are in Table 35.

Table 35. RMII Transmit AC Timing Specifications

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

Parameter/Condition

Symbol 1

Min

Typ

Max

Unit

REF_CLK clock period

tRMT

15.0

20.0

25.0

REF_CLK duty cycle

tRMTH

REF_CLK peak-to-peak jitter

tRMTJ

—

250

Rise time REF_CLK (20%–80%)

tRMTR

1.0

—

2.0

Fall time REF_CLK (80%–20%)

tRMTF

1.0

—

2.0

GTX_CLK

tRGT

tRGTH

tSKRGT

TX_CTL

TXD[8:5]

TXD[7:4]

TXD[9]

TXERR

TXD[4]

TXEN

TXD[3:0]

(At Transmitter)

TXD[8:5][3:0]

TXD[7:4][3:0]

TX_CLK

(At PHY)

RX_CTL

RXD[8:5]

RXD[7:4]

RXD[9]

RXERR

RXD[4]

RXDV

RXD[3:0]

RXD[8:5][3:0]

RXD[7:4][3:0]

RX_CLK

(At PHY)

tSKRGT

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