PCF5271CVM100 datasheet(26/56 Pages) FREESCALE

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MCF5271 Integrated Microprocessor Hardware Specification, Rev. 1.2

Design Recommendations

Freescale Semiconductor

The serial mode interface operates in what is generally referred to as AMD mode. The MCF5271

configuration for seven-wire serial mode connections to the external transceiver are shown in Table 24.

Refer to the M5271EVB evaluation board user’s manual for an example of how to connect an external

PHY. Schematics for this board are accessible at the MCF5271 site by navigating to:

http://www.freescale.com.

Table 23. MII Mode

Signal Description

MCF5271 Pin

Transmit clock

ETXCLK

Transmit enable

ETXEN

Transmit data

ETXD[3:0]

Transmit error

ETXER

Collision

ECOL

Carrier sense

ECRS

Receive clock

ERXCLK

Receive enable

ERXDV

Receive data

ERXD[3:0]

Receive error

ERXER

Management channel clock

EMDC

Management channel serial data

EMDIO

Table 24. Seven-Wire Mode Configuration

Signal Description

MCF5271 Pin

Transmit clock

ETXCLK

Transmit enable

ETXEN

Transmit data

ETXD[0]

Collision

ECOL

Receive clock

ERXCLK

Receive enable

ERXDV

Receive data

ERXD[0]

Unused, configure as PB14

ERXER

Unused input, tie to ground

ECRS

Unused, configure as PB[13:11]

ERXD[3:1]

Unused output, ignore

ETXER

Unused, configure as PB[10:8]

ETXD[3:1]

Unused, configure as PB15

EMDC

Input after reset, connect to ground

EMDIO

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