PXN20RM Datasheet, PDF (567/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Chapter 25
Fast Ethernet Controller (FEC)
25.1 Introduction
This fast ethernet control chapter of the device Reference Manual provides a feature-set overview, a
functional block diagram, and transceiver connection information for both the 10 and 100 Mbps MII
(media independent interface), as well as the 7-wire serial interface. Additionally, detailed descriptions of
operation and the programming model are included.
NOTE
The FEC block is not implemented on the PXN20.
25.1.1 Block Diagram
The block diagram of the FEC is shown below. The FEC is implemented with a combination of hardware
and microcode. The off-chip (Ethernet) interfaces are compliant with industry and IEEE 802.3 standards.
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
25-1