MCF5270 FREESCALE [Freescale Semiconductor, Inc], MCF5270 Datasheet - Page 26

• Manufacturer Part Number: MCF5270
• Description: 32-bit Embedded Controller Division
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Design Recommendations
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
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.
26
MCF5271 Integrated Microprocessor Hardware Specification, Rev. 1.2
Transmit clock
Transmit enable
Transmit data
Collision
Receive clock
Receive enable
Receive data
Unused, configure as PB14
Unused input, tie to ground
Unused, configure as PB[13:11]
Unused output, ignore
Unused, configure as PB[10:8]
Unused, configure as PB15
Input after reset, connect to ground
Transmit clock
Transmit enable
Transmit data
Transmit error
Collision
Carrier sense
Receive clock
Receive enable
Receive data
Receive error
Management channel clock
Management channel serial data
Table 24. Seven-Wire Mode Configuration
Signal Description
Signal Description
Table 23. MII Mode
ETXCLK
ETXEN
ETXD[3:0]
ETXER
ECOL
ECRS
ERXCLK
ERXDV
ERXD[3:0]
ERXER
EMDC
EMDIO
MCF5271 Pin
ETXCLK
ETXEN
ETXD[0]
ECOL
ERXCLK
ERXDV
ERXD[0]
ERXER
ECRS
ERXD[3:1]
ETXER
ETXD[3:1]
EMDC
EMDIO
MCF5271 Pin
Freescale Semiconductor
Table
24.