K60P100M100SF2RM Datasheet, PDF (1228/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Functional Description
44.4.17.3 MDIO Operation
To perform a MDIO access, set the MDIO command register (ENETn_MMFR)
according to the description provided in MII Management Frame Register
(ENETn_MMFR).
To check when the programmed access completes, read the ENETn_EIR[MII] bit.
Start
Load ENETn_MMFR register
Read ENETn_EIR
MII = 1? ^N
Y
Figure 44-68. MDIO Access Overview
44.4.18 Ethernet Interfaces
The following Ethernet interfaces are implemented:
• Fast Ethernet MII (Medium Independent Interface)
• RMII 10/100 by way of interface converters/gaskets
The following table shows how to configure ENET registers to select each interface.
Mode
MII - 10Mbps¹
MII - 100Mbps¹
RMII - 10Mbps
RMII - 100Mbps
ECR[SPEED]
0
0
0
0
RCR[RMII_10T]
—
—
1
0
RCR[RMII_MODE]
0
0
1
1
1. Selecting between 10Mbps and 100Mbps MII mode is implicitly selected by the MII clock speed.
44.4.18.1 RMII interface
In RMII receive mode, for normal reception following assertion of CRS_DV, RXD[1:0]
is 00b until the receiver determines that the receive event has a proper start of stream
delimiter (SSD).
1228
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.