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Manuale per l’uso Texas Instruments TNETX3270

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Summary
  • Texas Instruments TNETX3270 - page 1

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Port Configurations: T wenty-Four 10-Mbit/s Ports – Ports Arranged in Three Groups of Eight Ports in a Multiplexed Interface – Direct Multiplex ...

  • Texas Instruments TNETX3270 - page 2

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description The TNETX3270 provides highly integrated switching solutions that allow network designers to lower overall system costs. Based on T exa ...

  • Texas Instruments TNETX3270 - page 3

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SDRAM Interface 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SDRAM-T ype and Quantity Indication 38 . . . . . . . ...

  • Texas Instruments TNETX3270 - page 4

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 V DD(2.5V) GND GND GND DD(3.3V) V PGV P ACKAGE (TOP VIEW) 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 2 ...

  • Texas Instruments TNETX3270 - page 5

    TNETX3270 ThunderSWITCH 24/3 ETHERNET SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999  POST OFFICE BOX 655303 DALLAS, TEXAS 75265 • 5 DA12–DA0 MRESET ECLK EDIO DD31–DD0 DCLK DRAS DCAS DW LEDDA T A LEDCLK SDA T A7–SDA T A0 SAD1–SAD0 SRNW SCS SRDY DRAM Port LED Activity Port ...

  • Texas Instruments TNETX3270 - page 6

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T erminal Functions 10-Mbit/s MAC multiplexed interface (ports 00–23) is multiplexed into three groups (TH0, TH1, and TH2) of eight ports † TER ...

  • Texas Instruments TNETX3270 - page 7

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T erminal Functions (Continued) 10-Mbit/s MAC multiplexed interface (ports 00–23) is multiplexed into three groups (TH0, TH1, and TH2) of eight p ...

  • Texas Instruments TNETX3270 - page 8

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T erminal Functions (Continued) 10-/100-Mbit/s MAC interface (ports 24–26) (continued) † TERMINAL I/O INTERNAL DESCRIPTION NAME NO. I/O RESISTO ...

  • Texas Instruments TNETX3270 - page 9

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T erminal Functions (Continued) SDRAM interface TERMINAL I/O INTERNAL DESCRIPTION NAME NO. I/O RESISTOR DESCRIPTION DA13 DA12 DA1 1 DA10 DA09 DA08 ...

  • Texas Instruments TNETX3270 - page 10

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T erminal Functions (Continued) host DIO interface TERMINAL I/O INTERNAL DESCRIPTION NAME NO. I/O RESISTOR DESCRIPTION SAD1 SAD0 143 142 I Pullup ...

  • Texas Instruments TNETX3270 - page 11

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T erminal Functions (Continued) serial MII management PHY interface TERMINAL I/O INTERNAL DESCRIPTION NAME NO. I/O RESISTOR DESCRIPTION MDCLK 121 ...

  • Texas Instruments TNETX3270 - page 12

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 12 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T erminal Functions (Continued) miscellaneous TERMINAL I/O INTERNAL DESCRIPTION NAME NO. I/O RESISTOR DESCRIPTION OSCIN 11 2 I None Master system ...

  • Texas Instruments TNETX3270 - page 13

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 13 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 DIO register groups T able 1. Internal Register and Statistics Memory Map REGISTERS LOADABLE USING 24C02 EEPROM? LOADABLE USING 24C08 EEPROM? DIO ...

  • Texas Instruments TNETX3270 - page 14

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 14 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T able 2. Detailed DIO Register Map BYTE 3 BYTE 2 BYTE 1 BYTE 0 DIO ADDRESS Port1control Port0control 0x0000 Port3control Port2control 0x0004 Port ...

  • Texas Instruments TNETX3270 - page 15

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 15 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T able 2. Detailed DIO Register Map (Continued) BYTE 3 BYTE 2 BYTE 1 BYTE 0 DIO ADDRESS Reserved (for EEPROM CRC) 0x00FC VLAN0ports 0x0100 VLAN1po ...

  • Texas Instruments TNETX3270 - page 16

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 16 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T able 2. Detailed DIO Register Map (Continued) BYTE 3 BYTE 2 BYTE 1 BYTE 0 DIO ADDRESS VLAN17QID VLAN16QID 0x0320 VLAN19QID VLAN18QID 0x0324 VLAN ...

  • Texas Instruments TNETX3270 - page 17

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 17 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T able 2. Detailed DIO Register Map (Continued) BYTE 3 BYTE 2 BYTE 1 BYTE 0 DIO ADDRESS Findnode<23–16> Findnode<31–24> Findnode&l ...

  • Texas Instruments TNETX3270 - page 18

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 18 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 interface description DIO interface The DIO interface is a general-purpose interface that can be used with a wide range of microprocessor or compu ...

  • Texas Instruments TNETX3270 - page 19

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 19 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 network management port Frames can be received or transmitted via the DIO interface using a built-in port, the network management (NM) port. Frame ...

  • Texas Instruments TNETX3270 - page 20

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 20 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 frame format on the NM port The frame format on the NM port differs slightly from a standard Ethernet frame format. The key dif ferences are: the ...

  • Texas Instruments TNETX3270 - page 21

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 21 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 frame format on the NM port (continued) TPID (T ag Protocol Identifier) TCI (T ag Control Information) Destination Address Source Address TPID TCI ...

  • Texas Instruments TNETX3270 - page 22

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 22 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 frame format on the NM port (continued) When a frame is transmitted on the NM port, no header stripping occurs (again because the NM port does not ...

  • Texas Instruments TNETX3270 - page 23

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 23 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 receive filtering of frames Received frames that contain an error (e.g., CRC, alignment, jabber , etc.) are discarded before transmission and the ...

  • Texas Instruments TNETX3270 - page 24

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 24 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 receive versus transmit priority The queue manager prioritizes receive and transmit traffic as follows: Highest priority is given to frames that c ...

  • Texas Instruments TNETX3270 - page 25

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 25 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T able 5. Source-Port Pretag Encoding MxxTXER MxxTXD3– MxxTXD0 SOURCE PORT 0 0000 Port 00 0 0001 Port 01 0 0010 Port 02 0 001 1 Port 03 0 0100 P ...

  • Texas Instruments TNETX3270 - page 26

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 26 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 port-routing-code pretag on reception If the pretag bit is set to 1 in the appropriate Portxcontrol register , during the seven MxxRCLK cycles pri ...

  • Texas Instruments TNETX3270 - page 27

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 27 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 EEPROM interface The EEPROM interface is provided so the system-level manufacturer can produce a CPU-less, preconfigured system to their customers ...

  • Texas Instruments TNETX3270 - page 28

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 28 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 EEPROM interface (continued) Multiple bus masters are not supported on the EEPROM interface because the ECLK pin always is driven by the device wi ...

  • Texas Instruments TNETX3270 - page 29

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 29 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 JT AG interface The TNETX3270 is fully IEEE Std 1 149.1 compliant. It also includes on-chip pullup resistors on the five JT AG terminals to elimin ...

  • Texas Instruments TNETX3270 - page 30

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 30 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T able 10. LED Status Bit Definitions and Shift Order ORDER NAME FUNCTION slast = 0 slast = 1 NAME FUNCTION 1–7 1–7 0 Zero. Dummy data for fir ...

  • Texas Instruments TNETX3270 - page 31

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 31 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 T able 1 1. 10-Mbit/s Interface Connections TNETX3270 TERMINAL TNETE2008 TERMINAL THxCLK ← IFCLK THxSYNC ← IFSYNC THxCOL ← IFCOL THxCRS ← ...

  • Texas Instruments TNETX3270 - page 32

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 32 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 CLK 23 45 67 0 1 M00TXD M01TXD M02TXD M03TXD M04TXD M05TXD M06TXD M07TXD M00TXD M01TXD 0 M00TXEN M00FHD M02COL M01TXEN M02TXEN M03TXEN M04TXEN M ...

  • Texas Instruments TNETX3270 - page 33

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 33 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Pause (0 = no pause) Half Duplex Half Duplex (0 = full duplex) Autonegotiation Begins Link Good (0 = full duplex) TNETE2008 latches final values, ...

  • Texas Instruments TNETX3270 - page 34

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 34 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 10-/100-Mbit/s MAC interfaces (ports 24–26) Unlike the 10-Mbit/s ports, each 10-/100-Mbit/s port has a dedicated set of signals to interface to ...

  • Texas Instruments TNETX3270 - page 35

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 35 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 10-/100-Mbit/s port configuration (continued) Each terminal is considered to be bidirectional, when pulled low by either TNETX3270 or by the PHY ( ...

  • Texas Instruments TNETX3270 - page 36

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 36 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 10-/100-Mbit/s port configuration in a managed switch The 10-/100-Mbit/s ports can be configured in a managed switch using either of the following ...

  • Texas Instruments TNETX3270 - page 37

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 37 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SDRAM interface (continued) T able 15. TNETX3270 T erminal Interface to SDRAMs TERMINALS SDRAM TERMINAL FUNCTION TNETX3270 SDRAM SDRAM TERMINAL FU ...

  • Texas Instruments TNETX3270 - page 38

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 38 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SDRAM-type and quantity indication Before beginning operation (by writing to the start bit of Syscontrol), it is necessary to indicate to the SDRA ...

  • Texas Instruments TNETX3270 - page 39

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 39 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 frame routing VLAN support The internal routing engine supports the IEEE Std 802.1Q VLANs as shown in Figure 8 and described in the following para ...

  • Texas Instruments TNETX3270 - page 40

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 40 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 IEEE Std 802.1Q headers – reception When the internal address-lookup engine (IALE) examines the received frame, it contains an IEEE Std 802.1Q h ...

  • Texas Instruments TNETX3270 - page 41

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 41 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 spanning-tree support Each port provides independent controls to block reception or transmission of frames, for learning of addresses, or to disab ...

  • Texas Instruments TNETX3270 - page 42

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 42 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Unknown Multicast Destination Start Known VLAN? Source Port = 1 in. VLANnports? Ye s Destination Address Found? Ye s Unkmem Key: interrupt No Ye s ...

  • Texas Instruments TNETX3270 - page 43

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 43 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Source Port Security Violation A B Ye s No new Remove Source Port (and other trunk members) From Port Routing Code Source Address Found? Source Po ...

  • Texas Instruments TNETX3270 - page 44

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 44 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 E Mirr Bit = 1? Remove: – Disabled Ports – Ports Blocked by TxBlockPorts From Port Routing Code Ye s If ((Source Port = MirrorPort or Port Rou ...

  • Texas Instruments TNETX3270 - page 45

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 45 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 port trunking/load sharing Port trunking is a technique that allows two or more ports to be parallel connected between switches and counted as one ...

  • Texas Instruments TNETX3270 - page 46

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 46 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 collision-based flow control Collision-based flow control provides a means of preventing frame reception for ports that are operating in half-dupl ...

  • Texas Instruments TNETX3270 - page 47

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 47 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 pause frame reception The IEEE Std 802.3X standard defines a MAC control frame as any frame containing a length/type value = 88.08 (hex). This dev ...

  • Texas Instruments TNETX3270 - page 48

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 48 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 pause frame transmission (continued) Pause frames are transmitted if required, even if the port is observing the pausetime period from a pause fra ...

  • Texas Instruments TNETX3270 - page 49

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 49 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TNETX3270 08 07 06 05 04 03 02 01 00 NM 09 26 Figure 10. Internal Wrap Example duplex wrap test Duplex wrap test is similar to internal wrap mode ...

  • Texas Instruments TNETX3270 - page 50

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 50 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 port mirroring It is possible to copy (or mirror) all frames that are received by and transmitted to a port designated by the Mirrorport register ...

  • Texas Instruments TNETX3270 - page 51

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 51 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 absolute maximum ratings over operating junction temperature range (unless otherwise noted) † Supply voltage range: V DD(2.5V) –0.5 V to 2.7 V ...

  • Texas Instruments TNETX3270 - page 52

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 52 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 P ARAMETER MEASUREMENT INFORMA TION Outputs are driven to a minimum high-logic level of 3.3 V and to a maximum low-logic level of 0 V . Output tra ...

  • Texas Instruments TNETX3270 - page 53

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 53 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 10-Mbit/s interface (ports 00–23) timing requirements (see Notes 3 through 6 and Figure 13) NO. MIN MAX UNIT 1 t c(THxCLK) † Cycle time, THxCL ...

  • Texas Instruments TNETX3270 - page 54

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 54 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 THxCLK (input) THxSYNC (input) THxCOL THxCRS THxLINK THxRXD3–THxRXD0 THxRXDV (inputs) THxTXEN THxTXD3–THxTXD0 THxRENEG (outputs) 1 2 2 5 3 6 4 ...

  • Texas Instruments TNETX3270 - page 55

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 55 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 10-/100-Mbit/s transmit ports (24, 25, and 26) timing requirements (see Figure 15) NO. MIN MAX UNIT 1 t c(MxxTCLK) Cycle time, MxxTCLK 25 25 ns 2 ...

  • Texas Instruments TNETX3270 - page 56

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 56 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SDRAM interface The SDRAM interface observes two types of timing: Multicycle timings between commands Subcycle timings between signals and DCLK Fi ...

  • Texas Instruments TNETX3270 - page 57

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 57 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SDRAM subcycle operating characteristics over recommended operating conditions (see Figure 17) NO. P ARAMETER MIN MAX UNIT 1 t c(DCLK) Cycle time, ...

  • Texas Instruments TNETX3270 - page 58

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 58 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 DIO/DMA interface The DIO interface is asynchronous to allow easy adaptation to a range of microprocessor devices and computer system interfaces. ...

  • Texas Instruments TNETX3270 - page 59

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 59 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 DIO/DMA read cycle timing requirements (see Figure 19) NO. MIN MAX UNIT 1 t w(SCSL) Pulse duration, SCS low ns 2 t w(SCSH) Pulse duration, SCS hig ...

  • Texas Instruments TNETX3270 - page 60

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 60 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 serial MII management interface timing requirements (see Figure 20) NO. MIN MAX UNIT 1 t su(MDIO) Setup time, MDIO valid before OSCIN ↑ , read 7 ...

  • Texas Instruments TNETX3270 - page 61

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 61 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 EEPROM interface operating characteristics over recommended operating conditions (see Figure 21) NO P ARAMETER TNETX3150 TNETX3150A UNIT NO . P AR ...

  • Texas Instruments TNETX3270 - page 62

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 62 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LED interface operating characteristics over recommended operating conditions (see Figure 22) NO. P ARAMETER MIN MAX UNIT 1 t c(LEDCLK) Cycle time ...

  • Texas Instruments TNETX3270 - page 63

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 63 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 power-up OSCIN and RESET timing requirements (see Figure 23) NO. MIN NOM MAX UNIT Frequency drift, OSCIN clock ± 50 ppm 1 t c(OSCIN) Cycle time, ...

  • Texas Instruments TNETX3270 - page 64

    TNETX3270 ThunderSWITCH  24/3 ETHERNET  SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999 64 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MECHANICAL DA T A PGV (S-PQFP-G240) PLASTIC QUAD FLA TP ACK (DIE–DOWN) 4040247 / A 03/95 121 0,27 0,17 120 Seating Plane 60 61 Heat Slug 180 181 ...

  • Texas Instruments TNETX3270 - page 65

    IMPORT ANT NOTICE T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify , before placing orders, that information being relied on is current and complete. All product ...

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I documenti che otteniamo dal fabbricante del dispositivoTexas Instruments TNETX3270 possono essere suddivisi in diversi gruppi. Questi sono tra gli altri:
- disegni tecnici Texas Instruments
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Tutti sono importanti, ma le informazioni più importanti dal punto di vista di utilizzo del dispositivo possono essere trovate nel manuale per l’uso Texas Instruments TNETX3270.

Un gruppo di documenti denominato manuali per l’uso, è anche suddiviso in tipi più specifici, come: Manuali di installazione Texas Instruments TNETX3270, manuali di manutenzione, brevi manuali o manuali utente Texas Instruments TNETX3270. A seconda delle esigenze, si dovrebbe cercare il documento necessario. Nel nostro sito web, puoi visualizzare il manuale più popolare per l'uso del prodotto Texas Instruments TNETX3270.

Manuali per l’uso simili

Manuale completo del dispositivo Texas Instruments TNETX3270, come deve essere?
Il manuale per l’uso, denominato anche istruzioni per l’uso, o semplicemente il manuale è un documento tecnico progettato per aiutare ad utilizzare Texas Instruments TNETX3270 dagli utenti. I manuali sono di solito scritti da uno scrittore tecnico, ma in un linguaggio accessibile a tutti gli utenti Texas Instruments TNETX3270.

Il manuale per l’uso completo Texas Instruments, dovrebbe includere vari elementi di base. Alcuni di loro sono meno importanti, come ad esempio: copertina / pagina del titolo o pagina di autore. Tuttavia, la parte rimanente, dovrebbe fornire informazioni importanti dal punto di vista dell'utente.

1. Introduzione e la guida su come utilizzare il manuale Texas Instruments TNETX3270 - All'inizio di ogni manuale, dovremmo trovare indizi su come utilizzare il documento. Dovrebbe contenere informazioni sulla posizione dell’indice Texas Instruments TNETX3270, FAQ o i problemi più comuni : i punti che sono più spesso cercati dagli utenti di ogni manuale
2. Indice - elenco di tutti i suggerimenti per Texas Instruments TNETX3270 che possono essere trovati nel documento corrente
3. Suggerimenti su come utilizzare le funzioni di base del dispositivo Texas Instruments TNETX3270 - che ci dovrebbe aiutare nei primi passi durante l'uso Texas Instruments TNETX3270
4. Troubleshooting - sequenza sistematica delle attività che vi aiuterà a diagnosticare e, successivamente, risolvere i problemi più importanti del Texas Instruments TNETX3270
5. FAQ - domande più frequenti
6. Dettagli di contatto Informazioni su dove cercare il contatto con il fabbricante / servizio Texas Instruments TNETX3270 in un dato paese, se il problema non può essere risolto da noi stessi.

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