82546EB Datasheet, PDF (10/47 Pages) Intel Corporation – Dual Port Gigabit Ethernet Controller

82546EB — Networking Silicon
2.0
Features of the 82546EB Dual Port Gigabit Ethernet
Controller
2.1
PCI Features
2.2
Features
Benefits
PCI-X Revision 1.0a support for frequencies up to
133 MHz
• Bandwidth support for more headroom allowance
for Gigabit Ethernet
Multi-function PCI device
• One electrical load on the bus
• PCI/PCI-X bridge component not required for a
dual port design implementation
• Application flexibility for LAN on Motherboard
PCI Revision 2.2 support for 32-bit wide or 64-bit wide
(LOM) or embedded solutions
interface at 33 MHz and 66 MHz
• 64-bit addressing for systems with more than 4
Gbytes of physical memory
Algorithms that optimally use advanced PCI, MWI,
MRM, and MRL commands as well as PCI-X MRD,
MRB, and MWB commands
• Efficient bus operations
MAC Specific Features
Features
Benefits
Low-latency transmit and receive queues
• Network packets handled without waiting or buffer
overflow.
IEEE 802.3x compliant flow control support with
software controllable pause times and threshold
values
• Control over the transmissions of pause frames
through software or hardware triggering
• Frame loss reduced from receive overruns
Caches up to 64 packet descriptors in a single burst • Efficient use of PCI bandwidth
Programable host memory receive buffers (256 Bytes
to 16 Kbytes) and cache line size (16 Bytes to 256 • Efficient use of PCI bandwidth
Bytes)
Wide, optimized internal data path architecture (128
bits)
• Low latency data handling
• Superior DMA transfer rate performance
Dual 64 Kbytes configurable Transmit and Receive
FIFO buffers
• No external FIFO memory requirements
• FIFO size adjustable to application
Descriptor ring management hardware for transmit
and receive
• Simple software programming model
Optimized descriptor fetching and write-back
mechanisms
• Efficient system memory and use of PCI
bandwidth
Mechanism available for reducing interrupts
generated by transmit and receive operations
• Maximizes system performance and throughput
Support for transmission and reception of packets up
to 16 Kbytes
• Enables jumbo frames
4
Datasheet