OVERVIEW
The Broadcom BCM5346 device is a highly integrated solution providing connectivity for 17 ports of Gigabit Ethernet. It combines all the functions of a high-speed switch system, including packet buffer, media access controllers, address management, and a nonblocking switch fabric as well as a Microcontroller interface into a single 0.13 µm CMOS device. It complies with IEEE 802.3, 802.3u, 802.3ab, and 802.3x specifications, including the MAC control, pause frame, and auto-negotiation subsections, providing compatibility with all industry standard Ethernet, Fast Ethernet, and Gigabit Ethernet devices.

FEATURES
• Supports 17 Gigabit Ethernet ports in wirespeed operation
• Gigabit Ethernet ports support RGMII interfaces to Standard GE Transceivers
• Uplink port supports GMII interface
• On-chip L2 search table supports 8K MAC addresses
• Jumbo Frame support (9 Kbyte)
• Supports 4K VLAN address and 802.1s Multiple Spanning Tree protocol
• Supports 802.1w Rapid Spanning Tree
• Supports 802.1p and/or DiffServ with four priority queues
• Supports 802.3ad link aggregation
• Supports selected MIB groups in RMON
• Supports up to 256 IP multicast groups
• Full-duplex and half-duplex operation with IEEE 802.3x flow control and backpressure
• On-chip 512 Kbyte packet buffer memory with sophisticated buffer management
• Offers per-port rate control
• Supports 802.1x access control protocol
• Extremely low power consumption (4W)
• Packaged in 676-pin BGA