LM3S9781 Datasheet, PDF (50/1155 Pages) Texas Instruments – Stellaris® LM3S9781 Microcontroller

Architectural Overview
1.1.4.1
■ Two Synchronous Serial Interface modules (SSI)
■ Integrated Interchip Sound (I²S) Module
The following sections provide more detail on each of these communications functions.
Ethernet Controller (see page 804)
Ethernet is a frame-based computer networking technology for local area networks (LANs). Ethernet
has been standardized as IEEE 802.3. This specification defines a number of wiring and signaling
standards for the physical layer, two means of network access at the Media Access Control
(MAC)/Data Link Layer, and a common addressing format.
The Stellaris^® Ethernet Controller consists of a fully integrated media access controller (MAC) and
network physical (PHY) interface and has the following features:
■ Conforms to the IEEE 802.3-2002 specification
– 10BASE-T/100BASE-TX IEEE-802.3 compliant. Requires only a dual 1:1 isolation transformer
interface to the line
– 10BASE-T/100BASE-TX ENDEC, 100BASE-TX scrambler/descrambler
– Full-featured auto-negotiation
■ Multiple operational modes
– Full- and half-duplex 100 Mbps
– Full- and half-duplex 10 Mbps
– Power-saving and power-down modes
■ Highly configurable
– Programmable MAC address
– LED activity selection
– Promiscuous mode support
– CRC error-rejection control
– User-configurable interrupts
■ Physical media manipulation
– MDI/MDI-X cross-over support through software assist
– Register-programmable transmit amplitude
– Automatic polarity correction and 10BASE-T signal reception
■ Efficient transfers using Micro Direct Memory Access Controller (µDMA)
– Separate channels for transmit and receive
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June 29, 2010
Texas Instruments-Advance Information