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Texas Instruments TNETX3270 Table 2. Detailed DIO Register Map

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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

14 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Table 2. Detailed DIO Register Map

BYTE 3 BYTE 2 BYTE 1 BYTE 0 DIO

ADDRESS

Port1control Port0control 0x0000

Port3control Port2control 0x0004

Port5control Port4control 0x0008

Port7control Port6control 0x000C

Port9control Port8control 0x0010

Port11control Port10control 0x0014

Port13control Port12control 0x0018

Port15control Port14control 0x001C

Port17control Port16control 0x0020

Port19control Port18control 0x0024

Port21control Port20control 0x0028

Port23control Port22control 0x002C

Port25control Port24control 0x0030

Reserved Port26control 0x0034

Reserved Reserved 0x0038:0x003F

Reserved UnkVLANport Mirrorport Uplinkport 0x0040

Reserved Aging threshold 0x0044

Reserved 0x0048:0x004F

Nlearnports 0x0050

Txblockports 0x0054

Rxuniblockports 0x0058

Rxmultiblockports 0x005C

Unkuniports 0x0060

Unkmultiports 0x0064

Unksrcports 0x0068

UnkVLANintports 0x006C

Reserved 0x0070:0x007F

Trunkmap3 Trunkmap2 Trunkmap1 Trunkmap0 0x0080

Trunkmap7 Trunkmap6 Trunkmap5 Trunkmap4 0x0084

Reserved Trunkports 0x0088

Reserved 0x008C:0x009F

Devcode Reserved SIO Revision 0x00A0

Reserved 0x00A4:0x00DF

RAMsize Reserved IOBcontrol 0x00E0

Reserved 0x00E4

Pausetime100 Pausetime10 0x00E8

Reserved 0x00EC

Reserved Flowthreshold 0x00F0

Reserved LEDcontrol 0x00F4

Syscontrol Statcontrol 0x00F8

Contents

Main TNETX3270 ThunderSWITCH24/3 ETHERNET SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS TNETX3270 ThunderSWITCH24/3 ETHERNET SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS description TNETX3270 ThunderSWITCH24/3 ETHERNET SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS ThunderSWITCH24/3 ETHERNET SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS043B NOVEMBER 1997 REVISED APRIL 1999 PGV PACKAGE (TOP VIEW) ThunderSWITCH 24/3 ETHERNET SWITCH PRODUCT PREVIEW Figure 1. TNETX3270 Interface Block Diagram Page TNETX3270 10-/100-Mbit/s MAC interface (ports 2426) 10-/100-Mbit/s MAC interface (ports 2426) (continued) SDRAM interface WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS host DIO interface serial MII management PHY interface EEPROM interface LED interface JTAG interface miscellaneous power interface summary of signal terminals by signal group function DIO register groups Table 1. Internal Register and Statistics Memory Map Table 2. Detailed DIO Register Map Page Page Page interface description receiving/transmitting management frames state of DIO signals during hardware reset network management port Page Page receive control giant (long) frames short frames receive filtering of frames data transmission transmit control adaptive performance optimization (APO) (transmit pacing) interframe gap enforcement ThunderSWITCH 24/3 ETHERNET SWITCH WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS receive versus transmit priority uplink pretagging Table 5. Source-Port Pretag Encoding Page TNETX3270 interaction of EEPROM load with the SIO register summary of EEPROM load outcomes compatibility with future device revisions HIGHZ instruction lamp test multi-LED display hardware configurations Page TNETX3270 Figure 6. 10-Mbit/s Interface-Port Signal Timing Figure 7. Connecting to TNETE2008 PHY 10-/100-Mbit/s port configuration 10-/100-Mbit/s port configuration (continued) 10-/100-Mbit/s port configuration in a nonmanaged switch 10-/100-Mbit/s port configuration in a managed switch SDRAM interface (continued) Table 15. TNETX3270 Terminal Interface to SDRAMs SDRAM-type and quantity indication initialization refresh 39 frame routing txacc Figure 8. VLAN Overview Transmit rxacc IEEE Std 802.1Q headers reception IEEE Std 802.1Q headers transmission address maintenance spanning-tree support aging algorithms frame-routing determination Unkmem Figure 9. Frame-Routing Algorithm interrupt UnkVLAN Figure 9. Frame-Routing Algorithm (Continued) new chng secvio Port Trunking/Load Sharing port mirroring port trunking/load sharing collision-based flow control IEEE Std 802.3 flow control Page internal wrap test duplex wrap test Page absolute maximum ratings over operating junction temperature range (unless otherwise noted) recommended operating conditions electrical characteristics over recommended operating conditions (unless otherwise noted) PARAMETER MEASUREMENT INFORMATION test measurement 10-Mbit/s interface (ports 0023) timing requirements (see Notes 3 through 6 and Figure 13) Figure 13. 10-Mbit/s Interface (Ports 0023) 10-/100-Mbit/s MAC interface Figure 14. 10-/100-Mbit/s Receive Ports 10-/100-Mbit/s timing requirements (see Note 7 and Figure 14) 10-/100-Mbit/s timing requirements (see Figure 15) operating characteristics over recommended operating conditions (see Note 8 and Figure 15) Figure 15. 10-/100-Mbit/s Transmit Ports SDRAM interface SDRAM subcycle operating characteristics over recommended operating conditions (see Figure 17) Figure 17. SDRAM Subcycle DIO/DMA interface Figure 18. DIO/DMA Write Cycle timing requirements (see Figure 18) operating characteristics over recommended operating conditions (see Figure 18) DIO/DMA read cycle timing requirements (see Figure 19) Figure 19. DIO/DMA Read Cycle operating characteristics over recommended operating conditions (see Figure 19) serial MII management interface timing requirements (see Figure 20) operating characteristics over recommended operating conditions (see Figure 20) Figure 20. Serial MII Management Read/Write Cycle EEPROM interface operating characteristics over recommended operating conditions (see Figure 21) Figure 21. EEPROM LED interface operating characteristics over recommended operating conditions (see Figure 22) Figure 22. LED power-up OSCIN and RESET timing requirements (see Figure 23) Figure 23. Power-Up OSCIN and RESET MECHANICAL DATA PGV (S-PQFP-G240) PLASTIC QUAD FLATPACK (DIEDOWN)