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Single-Chip 16-Port SerDes Gigabit Switch.The BCM5396 is a 16-port Gigabit Ethernet (GbE) switch integrated with 16 1.25G SerDes/SGMII port interfaces for connecting to external Gigabit PHYs or fiber modules. The BCM5396 provides the lowestcost GbE functionality to the desktop switching solution or WebSmart™ application. The BCM5396 is a highly integrated solution, combining all of the functions of a high-speed switch system, including packet buffer, Media Access Controllers (MACs), address management, and a nonblocking switch controller into a single monolithic 0.13 µm CMOS device. The BCM5396 complies with the 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 GbE devices. The BCM5396 device provides integrated 1.25G SerDes, reducing board footprint requirements. The 16 ports have SGMII interfaces for connecting with external GbE transceivers. 16-port 10/100/1000 Mbps integrated switch controller via 1.25G SerDes/SGMII/fiber • Embedded 256 KB on-chip packet buffer • One 10/100/1000 Mbps In-band Management Port (IMP) with GMII/RGMII/RvMII/MII interface for PHY-less connection to a CPU/management entity (for management purposes only) • Integrated address management • Supports up to 4K MAC addresses • Supports jumbo frames up to 9728 bytes. • Supports EEPROM for low-cost chip configuration • Integrated Motorola® SPI-compatible interface • Supports port mirroring • Port-based VLAN and 4K IEEE 802.1Q tag VLAN • Port-, DiffServ-, MAC-, and IEEE 802.1p-based QoS for four queues • Supports Spanning Tree, Rapid Spanning Tree, and Multiple Spanning Tree protocols (802.1D/1s/1w) • Supports IEEE Standard 802.1X port security • Supports pseudo-PHY MDIO access • MAC-based trunking with link fail-over • Ethernet-in-the-last-mile (EFM) support: OAM and P • Low-power (2.2W total) 1.2V core/2.5V (SGMII I/ O)/3.3V (GMII/MII/RvMII) and 2.5V RGMII operation with 3.3V I/O tolerance • 256-pin FBGA package