TNETX15VE
VLAN-ENGINE ADDRESS-LOOKUP DEVICE

SPWS028A – APRIL 1997 – REVISED JUNE 1997

• Provides up to 2K-Address Matching System
• VLAN Support for Single or Multiple ThunderSWITCH^TM Devices
• Provides Glueless External-Address Match (EAM) Interface to the TNETX3150
• Uses Standard Off-the-Shelf SRAMs
• EEPROM Interface for Auto-Configuration, No CPU Needed
• Automatic Aging Through User-Selectable Aging (AGE) Threshold
• Fabricated in 3.3-V Low-Voltage Technology
• Requires 3.3-V and 5-V Power Supplies
• 5-V Tolerant I/Os
• Provides Direct Input/Output (DIO) Interface for Management Access and Control of the Address-Lookup Table
• Address Lookups, Adds, and Deletes Are Automatically Performed in Hardware
• User-Selectable Interrupts Simplify the Management Operations
• Provides Spanning-Tree Support
• Secure Addresses With Changing Ports
• MII Data I/O (MDIO) PHY Management Interface
• Management Access to Statistic Registers
• Packaged in 144-Terminal Plastic Quad Flatpack
• JTAG Compliant

description

The TNETX15VE performs the VLAN-engine address-lookup function for the TNETX3150 EthernetE switch using a glueless interface. The TNETX15VE device determines the addresses to use and match from the TNETX3150 DRAM bus. The address-lookup table is maintained in external SRAM. The frame-matching and routing information is given to the TNETX3150 through the external address-matching (EAM) interface.

The TNETX15VE is designed to work in either unmanaged or managed mode. Unmanaged operation is accomplished through EEPROM support. Startup options are auto-loaded into the TNETX15VE registers using the EEPROM interface. If the TNETX15VE is initialized by automatic loading from the EEPROM, it begins operation automatically.

All functions of this device are fully controllable by management through a direct input/output (DIO) interface. In addition, this device can interrupt the external management processor with user-selectable interrupts.

This device also provides support for easy management control of IEEE Std 802.3u media-independent interface (MII) managed devices.