317697-001 Ver la hoja de datos (PDF) - Intel
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317697-001 Datasheet PDF : 69 Pages
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82575 Gigabit Ethernet Controller Datasheet
2.0
Features of the 82575 Gigabit Ethernet Controller
2.1
PCI Express Features
2.2
Features
Uses x4 PCI Express interface on MCH device
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_N available for wakeup event
• Less congested board routing
•
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
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
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