GW80314GSSL7NK Datasheet, PDF (16/88 Pages) Intel Corporation – Intel® GW80314 I/O Companion Chip

Intel® GW80314 I/O Companion Chip
Features
2.6
Gigabit Ethernet (GigE) Interface
The Ethernet block is made up of four major sub-blocks. It includes two Gigabit Ethernet
interfaces, E0 and E1. There is a single management interface to manage the two PHY devices.
Each Ethernet interface has its own statistics monitor that tracks and reports key interface statistics.
Each ethernet interface supports a 256-entry hash table for address filtering. Each Ethernet
interface is bridged to the SFN interface domain through a 2K byte transmit FIFO and a 4K byte
Receive FIFO. There are four independent DMA engines to support transmit and receive data
flows for both Ethernet interfaces. The DMA engines rely on descriptors set up in memory, the
memory map of the device, and are accessed through the SFN interface. The DMA arbiter handles
arbitration for the SFN interface. A register bus interface is provided for the register access and
status monitor control.
The GigE interface has the following features:
• Full support for 10/100/1000 Mbits/s Ethernet standards IEEE 802.3, 802.3u, 802.3x, 802.3z,
802.3ac
• Full/half-duplex support at 10/100 Mbits/s, full-duplex only Gigabit Ethernet support
• MAC Control Sublayer w/PAUSE, extended OPCODE support
• MII Management with suppressed preamble, sequential cycle, variable clock features
• 8-bit MAC engine optimized for size, reduced latency
• Optional half-duplex back-pressure (10/100 Mbits/s only)
• Hash table support for packet filtering
• VLAN packet filtering support
• Standard register read/write interface
• 2K/4K transmit/receive FIFOs for data flow synchronization
• Two independent DMA channels per Ethernet port: one transmit and one receive
• Four transmit priority descriptor queues controlled via transmit priority tagging
• Four receive priority descriptor queues controlled by receive packet filtering priority
• Collisions detect and retransmit error handling
• PHY management interface
• Statistics monitoring and logging: support for RMON MIB group 1, RMON MIB group 2 if
table counters, RMON MIB group3, RMON MIB group 9, RMON MIB 2, and the dot 3
Ethernet MIB
16
Datasheet