VT6516

The VT6516 is a switch engine chip implementation of a 16 ports 10/100M Ethernet switch system for IEEE 802.3 and IEEE 802.3u network. Each of individual port can be either auto-sensing or manually selected to run at 10Mbps or 100Mbps speed rate and under full or half duplex mode.

There are sixteen independent MACs within the VT6516 chip. The MAC controller controls the receiving, transmitting, and deferring of each individual port, and the MAC controller also provides framing, FCS checking, error handling, status indication and flow control function.

The VT6516 10/100M N-way switch port IC is wire-speed performance and low-cost packet switch; it can forward up to 148,810 packets/sec on each Ethernet port. The VT6516 support 12 ports MII or 16 ports RMII (reduce MII) interface for network interface,

The VT6516 used the simple 8/16 bits ISA-like interface to support initiation, expansion and management. The system CPU can access various registers inside VT6516 through a simple ISA-like CPU interface. The CPU can configure the switch by writing into the appropriate registers, or retrieve the status of the switch by reading the corresponding registers. The CPU can also access the register of external transceiver (PHY) device through the CPU interface.

The VT6516 supports new features including port based VLAN , 802.3X flow control, and the VT6516 also support the sniffer function to monitor network traffic in special ports.