VT6516 datasheet(6/73 Pages) ETC

6 / 73 page

VIA Technologies, Inc.

Preliminary VT6516 Datasheet

FEATURES

Single chip 16/12 ports 10/100M Ethernet switch controller

Highly integrated single chip shared memory switch engine

With option for 16 RMII (Reduced Media Independent Interface) ports or 12 MII

(Media Independent Interface) ports

Non-blocking layer 2 switch, 148,810 packets/sec on each 100Mbps Ethernet port

Media Access Control (MAC)

Dual 192-bytes FIFO’s of receive and transmit for each port

CRC generator for outgoing packets from CPU port

IEEE 802.3X compliant flow control for full duplex ports

Backpressure for half duplex ports

Two switching mechanisms

Supports ‘store and forward’ switching without forwarding CRC-bad packets

Supports ‘cut through’ switching subject to long packets of length over 290 bytes for

100Mbps ports or of length over 98 bytes for 10Mbps ports

Packet buffering

Glueless 64-bit interface to SDRAM as a packet buffer pool with size from 2M bytes

(SGRAM) to 512 M bytes

1536 bytes for each packet buffer

External 32 bits SSRAM interface for forwarding table and memory link table

Link list structure initialized by software

2K up to 32K unicast/multicast addresses table entries with VLAN information

Supports static entries for upper-layer multicast protocols, e.g. IGMP

Advanced address recognition

Layer 2 MAC address recognition engine to enable wire-speed forwarding rate

Self learning mechanism

Supports multiple MAC address per-port from 2K up to 32K unicast/multicast

addresses

Switch management support

Supports port mirroring (Sniffer feature)

Supports spanning tree algorithm

Supports CPU direct access to SDRAM and SSRAM

Supports five statistical counters in each port

Supports I

2C EEPROM interface for customized configuration

Support port-grouping VLAN

Configurable server ports belonging to multiple VLAN groups

Support port-based trunking

Three types of trunk grouping: one trunk group with 2 or 4 ports, two trunk groups

each with 2 ports

Load balance according to MAC address and port number

CPU interface VIA 8/16 bits ISA-like interface

VT6516 Datasheet(PDF) 6 Page - List of Unclassifed Manufacturers

VT6516 Datasheet(HTML) 6 Page - List of Unclassifed Manufacturers

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