VT6516 ETC, VT6516 Datasheet - Page 6

• Manufacturer Part Number: VT6516
• Description: 16/12 PORT 10/1000 ASE T/TX
• Manufacturer: ETC

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EATURES
Single chip 16/12 ports 10/100M Ethernet switch controller
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Media Access Control (MAC)
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Two switching mechanisms
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Packet buffering
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External 32 bits SSRAM interface for forwarding table and memory link table
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Advanced address recognition
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Switch management support
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Supports I
Support port-grouping VLAN
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Support port-based trunking
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CPU interface VIA 8/16 bits ISA-like interface
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
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
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
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
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
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
Supports port mirroring (Sniffer feature)
Supports spanning tree algorithm
Supports CPU direct access to SDRAM and SSRAM
Supports five statistical counters in each port
Configurable server ports belonging to multiple VLAN groups
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
VIA Technologies, Inc.
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C EEPROM interface for customized configuration
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Preliminary VT6516 Datasheet