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82540EM Gigabit Ethernet Controller
Networking Silicon
Datasheet
Product Features
■ PCI Bus
— PCI Revision 2.3 support for 32-bit wide interface at 33 MHz and 66 MHz
— Algorithms that optimally use advanced PCI, MWI, MRM, and MRL commands
■ MAC Specific
— Low-latency transmit and receive queues
— IEEE 802.3x-compliant flow-control support with software-controllable thresholds
— Caches up to 64 packet descriptors in a single burst
— Programmable host memory receive buffers (256 B to 16 KB) and cache line size (16 B to 256 B)
— Wide, optimized internal data path architecture
— 64 KB configurable Transmit and Receive FIFO buffers
■ PHY Specific
— Integrated for 10/100/1000 Mb/s operation full and half duplex operation
— IEEE 802.3ab Auto-Negotiation support
— IEEE 802.
82540EM Datasheet
