82575EB Datasheet, PDF (7/62 Pages) Intel Corporation – Intel® 82575EB Gigabit Ethernet Controller Datasheet

Features of the 82575EB Gigabit Ethernet Controller — Intel^® 82575EB Gigabit Ethernet
Controller
2.0 Features of the 82575EB Gigabit
Ethernet Controller
2.1 PCI Express Features
Features
Uses x4 PCI Express interface on MCH device.
Supports x4, x2, and x1 modes.
Peak bandwidth 2 GB/s in each direction per PCI Express lane
PCI Express Power Management
High bandwidth density per pin
64-bit address support for systems using more than 4 GB of
physical memory
Benefits
• Bus sharing not required
• Low latency path to memory
• Relieves congestion for IO devices connected to ICH
• Supports Gigabit Ethernet at full wire speed
• Compatible extensions to PCI power management and ACPI
• PE_WAKE available for wakeup event
• Less congested board routing
2.2 MAC-Specific Features
Features
I/O Acceleration Technology2 (IOAT2)
Four optimized transmit and receive queues
IEEE 802.3x compliant flow control support with software
controllable pause times and threshold values
Caches up to 64 packet descriptors (per queue)
Separate transmit and receive queues per port
Programmable host memory receive buffers (256 Bytes to 16
KBytes) and cache line size (64 Bytes to 128 Bytes)
Wide, pipelined internal data path architecture
Dual 8 KByte configurable Transmit and Receive FIFO buffers
Descriptor ring management hardware for transmit and receive
Optimized descriptor fetching and write-back mechanisms
Mechanism available for reducing interrupts generated by
transmit and receive operations
Benefits
• Accelerated TCP I/O.
• Network packets handled without waiting or buffer
overflow.
• Control over the transmissions of pause frames through
software or hardware triggering
• Frame loss reduced from receive overruns
• Efficient use of PCI Express bandwidth
• Efficient packet prioritization
• Efficient use of PCI Express bandwidth
• Low latency data handling
• Superior DMA transfer rate performance
• No external FIFO memory requirements
• FIFO size adjustable to application
• Simple software programming model
• Efficient system memory and use of PCI Express bandwidth
• Maximizes system performance and throughput
317679-004
Revision: 2.11
January 2011
Intel^® 82575EB Gigabit Ethernet Controller
Datasheet
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