K60P100M100SF2RM Datasheet, PDF (1231/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 44 10/100-Mbps Ethernet MAC (ENET)
44.4.18.2.1 Transmit with Collision — Half Duplex
When a collision is detected during a frame transmission (MII_COL asserted), the MAC
stops the current transmission, sends a 32-bit jam pattern, and re-transmits the current
frame.
(See Collision Detection in Half Duplex Mode for details)
Jam
MII_TXCLK
MII_TXD[3:0]
5
MII_TXEN
MII_TXER
MII_CRS
MII_COL
Figure 44-74. MII Transmit Operation — Transmission with Collision
44.4.18.3 MII Interface — Receive
On receive all signals are sampled on the MII_RXCLK rising edge. The MII data enable
signal, MII_RXDV, is asserted by the PHY to indicate the start of a new frame and
remains asserted until the last byte of the frame is present on MII_RXD[3:0] bus.
Between frames, MII_RXDV remains de-asserted.
Preamble
SFD
CRC-32
MII_RXCLK
MII_RXD[3:0]
5
MII_RXDV
MII_RXER
Figure 44-75. MII Receive Operation
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1231