Resumen del contenido incluido en la página 1
TWR-MCF52259-Ethenet
Hareesh S
Sr.FAE
TM
Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks
of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2006.
Resumen del contenido incluido en la página 2
Ethernet Overview Session Ethernet Router Ethernet NIC Ethernet Switch Ethernet Cables Ethernet Connector TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2006. 1
Resumen del contenido incluido en la página 3
Ethernet Overview Session What is Ethernet? • It’s a cable I connect to my computer to surf the net • It’s how I do emails • My home router uses it to let all my computers talk Why do we care about Ethernet? • Work is telling me I need it for my embedded product • It will let me remotely access my embedded product • Seems to be a cool way to have fast downloads How will I use Ethernet? • Just in factory application (i.e. local only) • Connected to WLAN (i.e. publicly accessible) • Through VPN on
Resumen del contenido incluido en la página 4
Ethernet Ethernet defines the mechanical/electrical connection between devices (the physical layer). Ethernet also defines a protocol used to communicate between multiple devices (the MAC layer). Ethernet is defined by the IEEE 802.3 standard TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconducto
Resumen del contenido incluido en la página 5
Network Network ® Generic ColdFire Board Layout of Ethernet MII – Media Independent Interface ® ® ColdFire ColdFire Cable On-Chip Ethernet Magnetics Magnetics RJ45 RJ45 RJ45 RJ45 Isolation Jack And MAC-Media Access Controller optional PoE PHY-Physical Layer Line Voltage Levels +2.8V or -2.8VDC TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property o
Resumen del contenido incluido en la página 6
Network Network M52233DEMO Board Layout of Ethernet MCF5223x MCF5223x Cable On-Chip Ethernet w/ PHY Magnetics Magnetics RJ45 RJ45 RJ45 RJ45 Isolation Jack And MAC-Media Access Controller optional PoE PHY-Physical Layer Line Voltage Levels +2.8V or -2.8VDC TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale S
Resumen del contenido incluido en la página 7
Ethernet Overview Physical Session Connectors • RJ-45 Cables • CAT-5 24 AWG solid bare copper Four unbounded twisted pairs TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2006. 6
Resumen del contenido incluido en la página 8
Ethernet Cable: Straight Through Pinout The following table demonstrates the proper color scheme. RJ-45 Sign Directi RJ-45 Wire pair #1: White/Blue Pin al on Pin Blue 1 TX+ ---> 1 Wire pair #2: White/Orange 2 TX- ---> 2 Orange 3 RX+ <--- 3 4 - - 4 Wire pair #3: White/Green Green 5 - - 5 6 RX- <--- 6 Wire pair #4: White/Brown 7 - - 7 Brown 8 - - 8 Source: http://www.netspec.com/helpdesk/wiredoc.html TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Free
Resumen del contenido incluido en la página 9
Ethernet Cable: Crossover Pinout The following is the proper pin out and cable pair/color order for the "crossover" end. Pair#2 is connected to pins 1 and 2 like this: Pin 1 wire color: white/green Pin 2 wire color: green Pair#3 is connected to pins 3 and 6 like this: Pin 3 wire color: white/orange Pin 6 wire color: orange TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or s
Resumen del contenido incluido en la página 10
* Distance Signal Travels at 100 Mbits? Name Transmission Medium Data Rate Distance (Mb/s) (m) 100BASE-TX 2 pairs of Category UTP-5, 100 100 alternative 2 pairs of STP, 150 Ω Impedance, Cable Code MLT-3, Full Duplex 100BASE-FX 2 Multimode Optical Fiber (62.5/125 100 2,000 μm), Cable Code 4B5B, NRZI, Full Duplex 100BASE-T4 4 pairs of Category 3 UTP-(3/4/5) or 100 100 better, 100 Ω Impedance, Cable Code 8B6T, No Full Duplex 100BASE-T2 2 pairs of Category 3 UTP-(3/4/5) or 100 100 bet
Resumen del contenido incluido en la página 11
Full Duplex Ethernet Links Full duplex operation means that devices at each end of a full duplex link can send and receive data simultaneously. This means, theoretically, that Full Duplex has twice the bandwidth of normal (half duplex) Ethernet. Since there are only two devices on a full duplex link, there is no shared channel and no collisions. CSMA/CD protocol prevents this Half Duplex Full Duplex DTE DTE R DTE DTE S DTE DTE TM Freescale Semiconductor Confidential and Proprietary Informatio
Resumen del contenido incluido en la página 12
Basic Ethernet Network Hub Ethernet = Multiport Switch Router/Gateway repeater = Switching physically Hub, LAN star Switch topology Real star (common topology transport Physical medium connection only for the CSMA/CD!) duration of the Logically communication bus topology Outputs all incoming signals on all outputs TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. Al
Resumen del contenido incluido en la página 13
Basic Ethernet Bus Co-axial based Ethernet connection daisy chain connection TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2006. 12
Resumen del contenido incluido en la página 14
Collisions TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2006. 13
Resumen del contenido incluido en la página 15
HUB Centralized connection Can bypass not connected TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2006. 14
Resumen del contenido incluido en la página 16
Switch The switch reads the destination addresses and 'switches' the signals directly to the recipients without broadcasting to all of the machines on the network. This 'point to point' switching alleviates the problems associated with collisions and considerably improves network speed. TM Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of th
Resumen del contenido incluido en la página 17
Ethernet Router/Gateway A Router or Gateway is used to translate one protocol to another. It is also used when the physical layer changes mediums. Ethernet to fiber At one time there was a difference between a router and a gateway. The gateway was strictly used as a medium translator ( electrical ) and the router was strictly used as protocol translator ( software ). Now routers and gateways are normally combined and called a routers. Note: Ethernet to WiFi is a router functionality.
Resumen del contenido incluido en la página 18
Magnetics/Fiber Transceiver *Media Independent Interface (MII) • The MII links the Ethernet MAC with Typical MII Interface the PHY. • An MII may support both 10-Mb/s and TXD n_<3:0> TX_ERn 100-Mb/s operation, allowing network TX_ENn TX_CLKn devices to connect to both 10BASE-T RXD n_<3:0> and 100BASE-T media segments. RXDVn RX_ER n • The MII electronics may be linked to RX_CLK n CRS n an outboard transceiver through a COL n PHY 40-pin MII connector and a short with (0.5m) MII cable. MII
Resumen del contenido incluido en la página 19
*Autonegotiation Auto-Negotiation is the exchange of information about each stations abilities over a link segment allows the stations to achieve the best possible mode of operation. The highest performance mode of operation that Auto-Negotiation can achieve is based on a priority table. The Auto-Negotiation protocol contains a set of priorities which result in the devices selecting their highest common set of abilities. If the devices at both ends of the link can support full duplex oper
Resumen del contenido incluido en la página 20
The Ethernet Data Packet Format Ethernet Data Frame – old/original format used Destination Source Frame Frame FCS Address Address Type User Data Checksum Preamble 8 Byte 6 Byte 6 Byte 2 Byte 46 – 1500 Byte 4 Byte 64-1518 IEEE 802.3 Data Frame Destination Source Length Frame FCS SOF Address Address Type User Data Checksum Preamble 7 Byte 1 Byte 2/6 Byte 2/6 Byte 2 Byte 46 – 1500 Byte 4 Byte DSAP SSAP Con
