Texas Instruments specifications Duplex wrap test, PHY TNETX3270

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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

08	09			26
07
06		TNETX3270		NM
		TNETX3270
05
04	03	02	01	00

Figure 10. Internal Wrap Example

duplex wrap test

Duplex wrap test is similar to internal wrap mode (see Figure 11). The ports can be set to accept frame data that is wrapped at the PHY. This permits network connections between the device and the PHY to be verified. Any port can be the source port (not just the NM port as shown in Figure 10). By using multicast/broadcast frames, traffic can be routed selectively between ports involved in the test or return the frame directly before retransmission on the uplink. Software control of the external PHYs is required to configure them for loopback.

If the internal PCS is in use (port configured in PMA mode) loopback in PCSxcontrol also must be asserted. This causes MxxEWRAP to be high, forcing external PMD into loopback mode.

Duplex frame-wrap test mode is selected by setting dpwrap in Systest. When selected, the port is forced into full duplex, allowing it to receive frames it transmits.

The switch is configured in the same manner as internal wrap.

PHY

PHY

08	09			26
07
06		TNETX3270		NM
05
04	03	02	01	00

Figure 11. Duplex Wrap Example

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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Contents With 24 10-MBIT/S Ports and 3 10-/100-MBIT/S Ports TNETX3270 ThunderSWITCH 24/3 ETHERNET SwitchDescription With 24 10-MBIT/S Ports and 3 10-/100-MBIT/S PortsContents ThunderSWITCH 24/3 ETHERNETPGV Package TOP View  24/3 ThunderSWITCHTerminal Internal Description Name RESISTOR³ Terminal Internal Description Name Resistor 10-/100-Mbit/s MAC interface ports 24±26³10-/100-Mbit/s MAC interface ports 24±26 ² Terminal FunctionsDras Dcas Sdram interfaceDclk DrasHost DIO interface Eeprom interface Serial MII management PHY interfaceJtag interface Summary of signal terminals by signal group function Power interfaceMiscellaneous Internal Register and Statistics Memory Map DIO register groupsVlan Byte DIO Address Detailed DIO Register MapSIO VLAN3QID VLAN2QID VLAN1QID VLAN0QIDVLAN5QID VLAN4QID VLAN7QID VLAN6QIDVLAN19QID VLAN18QID VLAN17QID VLAN16QIDVLAN21QID VLAN20QID VLAN23QID VLAN22QIDTNETX3270 reset reinitializes the TNETX3270 0x40000x5FFF IntenableFindnode23±16 Findnode31±24 Findnode39±32 Findnode47±40 Findcontrol Findnode7±0 Findnode15±8Interface description State of DIO signals during hardware resetReceiving/transmitting management frames Network management port Frame format on the NM port FCS Vlan IDTpid TCI CRCMbit/s and 10-/100-Mbit/s MAC interface receive control MII serial management interface PHY managementGiant long frames Short framesData transmission Receive filtering of framesTransmit control Adaptive performance optimization APO transmit pacingUplink pretagging Receive versus transmit prioritySource Port Source-Port Pretag EncodingTAG Received Pretag Port AssignmentsPort 27 NM Edio TNETX3270 Eclk SCL SDA Eeprom interfaceGND Interaction of Eeprom load with the SIO register Outcome Stop Load Initd ² Fault LED EclkSummary of Eeprom load outcomes Summary of Eeprom Load OutcomesJtag Instruction Opcodes Jtag interfaceHighz instruction LED interfaceLED Status Bit Definitions and Shift Order Hardware configurationsLamp test Multi-LED displayTNETX3270 TNETE2008 Terminal Mbit/s Interface ConnectionsM03TXD M04TXD Port CLK Sync TXD3M06TXD M03COLConnecting to TNETE2008 PHY² Switch TNETE2101 Terminal 10-/100-Mbit/s port configuration10-/100-Mbit/s MAC interfaces ports 24±26 100-Mbit/s Interface ConnectionsDuplex Configuration ± MxxFORCEHD Speed Configuration ± MxxFORCE1010-/100-Mbit/s port configuration in a nonmanaged switch 10-/100-Mbit/s port configuration in a managed switch Sdram Terminals Not Driven by the TNETX3270 Sdram interface TNETX3270 Terminal Interface to SDRAMsTerminals Sdram Terminal Function TNETX3270 Held Sdram Terminal Terminal FunctionSDRAM-type and quantity indication TNETX3270 State Terminal During ResetInitialization RefreshVlan support Frame routingIale Ieee Std 802.1Q headers ± reception Address maintenanceIeee Std 802.1Q headers ± transmission Aging algorithms Spanning-tree supportFrame-routing determination Frame-Routing Algorithm SPWS043B ± November 1997 ± Revised April CDE Port mirroringFlow control Port trunking/load sharingIeee Std 802.3 flow control Collision-based flow controlPause frame reception Internal wrap test PHY TNETX3270 Duplex wrap testCopy to uplink MIN NOM MAX Unit Recommended operating conditionsParameter Test Conditions MIN TYP MAX Unit Test measurement Parameter MIN MAX Unit MIN MAX UnitTiming requirements see Note 7 and Figure 10-/100-Mbit/s MAC interface10-/100-Mbit/sreceive ports 24, 25 10-/100-Mbit/stransmit ports 24, 25, Timing requirements see FigureSdram command to command see Figure Sdram subcycle TdDA Delay time, from Dclk ↑ to DA InvalidDclk Dras DcasDIO/DMA write cycle DIO/DMA interfaceSDATA7± Z SDATA0 DIO/DMA read cycle Serial MII Management Read/Write Cycle Parameter TNETX3150 TNETX3150A Unit MIN MAX Eeprom² During hard reset, Ledclk runs continuously TdLEDDATA Delay time, from LEDCLK↑ to 1st LED invalidTsuRESET Setup time Low before Oscin ↑ Power-up Oscin and Reset Timing requirements see FigureThRESET Hold time Low after Oscin ↑ TtOSCIN Transition time, Oscin rise and fallMechanical Data Important Notice