Texas Instruments TNETX3270 specifications Frame-Routing Algorithm

Page 42

TNETX3270

ThunderSWITCH24/3 ETHERNETSWITCH

WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS

SPWS043B ± NOVEMBER 1997 ± REVISED APRIL 1999

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Start

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Key:

 

 

 

 

 

 

 

 

 

 

 

UnkVLAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

interrupt

 

 

 

 

 

 

 

Known

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VLAN?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

statistic

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unkmem

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

Source Port = 1 in.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VLANnports?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

Destination

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Address

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Found?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

Destination

No

Destination

 

 

 

 

Destination

No

 

 

 

 

 

 

 

 

Destination

No

 

 

Locked

is

 

 

 

 

 

is

 

 

 

 

 

 

 

 

 

 

is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit = 1?

 

 

 

Multicast?

 

 

 

 

Multicast?

 

 

 

 

 

 

 

 

 

 

Multicast?

 

 

 

 

 

 

 

No

 

 

 

 

Yes

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

Source

Port

 

 

 

Source Port

 

 

 

 

Source Port

 

 

Source

Port

 

 

 

Source Port

 

 

 

Yes

Blocked by

 

 

 

Blocked by

 

 

 

 

 

Blocked by

 

 

Blocked by

 

 

 

Blocked by

 

 

 

 

 

RxUniBlockPorts

 

 

 

RxMultiBlockPorts

 

 

 

 

RxMultiBlockPorts?

 

 

 

RxUniBlockPorts?

 

 

 

 

RxMultiBlockPorts or

 

 

 

 

 

 

and Dest.

 

 

 

and Dest.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UnkVLAN=0?

 

 

 

 

 

 

Nblck=0?

 

Yes

Nblck=0?

 

 

Yes

 

 

 

 

 

 

Yes

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

No

 

 

 

 

 

 

No

 

 

 

No

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Port Routing

 

 

 

Port Routing

 

 

 

 

Port Routing

 

 

 

Port Routing

 

 

 

 

Port Routing

 

 

 

 

 

 

Code = Port Code

 

 

 

Code = Port Vector

 

 

 

 

 

Code =

 

 

 

Code =

 

 

 

 

Code =

 

 

 

 

 

 

From Records

 

 

 

From Records

 

 

 

 

UnkMultiPorts

 

 

 

UnkUniPorts

 

 

 

 

UnkVLANPort

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unknown

 

 

 

 

Unknown

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Multicast

 

 

 

 

Unlcast

 

 

 

 

 

 

 

 

 

Set Port Routing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Destination

 

 

Destination

 

 

 

 

 

 

 

 

 

Code to 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Destination

Yes

Include UplinkPort

 

 

 

 

AND Port Routing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

in Port

 

 

 

 

Code With VLAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cuplink Bit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Routing Code

 

 

 

 

VLANnports Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Set?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To C

 

 

 

 

 

 

 

To A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To B

 

 

(Continued)

 

 

 

 

 

 

 

(Continued)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Continued)

 

 

Figure 9. Frame-Routing Algorithm

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Contents TNETX3270 ThunderSWITCH 24/3 ETHERNET Switch With 24 10-MBIT/S Ports and 3 10-/100-MBIT/S PortsWith 24 10-MBIT/S Ports and 3 10-/100-MBIT/S Ports DescriptionThunderSWITCH 24/3 ETHERNET ContentsPGV Package TOP View ThunderSWITCH  24/3Terminal Internal Description Name RESISTOR³ 10-/100-Mbit/s MAC interface ports 24±26³ Terminal Internal Description Name ResistorTerminal Functions 10-/100-Mbit/s MAC interface ports 24±26 ²Dclk Sdram interfaceDras Dcas DrasHost DIO interface Serial MII management PHY interface Eeprom interfaceJtag interface Power interface Summary of signal terminals by signal group functionMiscellaneous DIO register groups Internal Register and Statistics Memory MapVlan Detailed DIO Register Map Byte DIO AddressSIO VLAN5QID VLAN4QID VLAN1QID VLAN0QIDVLAN3QID VLAN2QID VLAN7QID VLAN6QIDVLAN21QID VLAN20QID VLAN17QID VLAN16QIDVLAN19QID VLAN18QID VLAN23QID VLAN22QIDFindnode23±16 Findnode31±24 Findnode39±32 Findnode47±40 IntenableTNETX3270 reset reinitializes the TNETX3270 0x40000x5FFF Findcontrol Findnode7±0 Findnode15±8State of DIO signals during hardware reset Interface descriptionReceiving/transmitting management frames Network management port Frame format on the NM port Tpid TCI Vlan IDFCS CRCGiant long frames MII serial management interface PHY managementMbit/s and 10-/100-Mbit/s MAC interface receive control Short framesTransmit control Receive filtering of framesData transmission Adaptive performance optimization APO transmit pacingReceive versus transmit priority Uplink pretaggingSource-Port Pretag Encoding Source PortReceived Pretag Port Assignments TAGPort 27 NM Eeprom interface Edio TNETX3270 Eclk SCL SDAGND Summary of Eeprom load outcomes Outcome Stop Load Initd ² Fault LED EclkInteraction of Eeprom load with the SIO register Summary of Eeprom Load OutcomesHighz instruction Jtag interfaceJtag Instruction Opcodes LED interfaceLamp test Hardware configurationsLED Status Bit Definitions and Shift Order Multi-LED displayMbit/s Interface Connections TNETX3270 TNETE2008 TerminalM06TXD Port CLK Sync TXD3M03TXD M04TXD M03COLConnecting to TNETE2008 PHY² 10-/100-Mbit/s MAC interfaces ports 24±26 10-/100-Mbit/s port configurationSwitch TNETE2101 Terminal 100-Mbit/s Interface ConnectionsSpeed Configuration ± MxxFORCE10 Duplex Configuration ± MxxFORCEHD10-/100-Mbit/s port configuration in a nonmanaged switch 10-/100-Mbit/s port configuration in a managed switch Terminals Sdram Terminal Function TNETX3270 Sdram interface TNETX3270 Terminal Interface to SDRAMsSdram Terminals Not Driven by the TNETX3270 Held Sdram Terminal Terminal FunctionInitialization TNETX3270 State Terminal During ResetSDRAM-type and quantity indication RefreshFrame routing Vlan supportIale Address maintenance Ieee Std 802.1Q headers ± receptionIeee Std 802.1Q headers ± transmission Spanning-tree support Aging algorithmsFrame-routing determination Frame-Routing Algorithm SPWS043B ± November 1997 ± Revised April Port mirroring CDEPort trunking/load sharing Flow controlCollision-based flow control Ieee Std 802.3 flow controlPause frame reception Internal wrap test Duplex wrap test PHY TNETX3270Copy to uplink Recommended operating conditions MIN NOM MAX UnitParameter Test Conditions MIN TYP MAX Unit Test measurement MIN MAX Unit Parameter MIN MAX Unit10-/100-Mbit/s MAC interface Timing requirements see Note 7 and Figure10-/100-Mbit/sreceive ports 24, 25 Timing requirements see Figure 10-/100-Mbit/stransmit ports 24, 25,Sdram command to command see Figure Dclk TdDA Delay time, from Dclk ↑ to DA InvalidSdram subcycle Dras DcasDIO/DMA interface DIO/DMA write cycleSDATA7± Z SDATA0 DIO/DMA read cycle Serial MII Management Read/Write Cycle Eeprom Parameter TNETX3150 TNETX3150A Unit MIN MAXTdLEDDATA Delay time, from LEDCLK↑ to 1st LED invalid ² During hard reset, Ledclk runs continuouslyThRESET Hold time Low after Oscin ↑ Power-up Oscin and Reset Timing requirements see FigureTsuRESET Setup time Low before Oscin ↑ TtOSCIN Transition time, Oscin rise and fallMechanical Data Important Notice
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